Research and Application of Glycoprotein Sensors Based on Glycosyl Recognition
Publication date: September 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 9Author(s): Jun-Yu LIANG, Pei-Hong TONG, Jian-Ping LIAbstractGlycoprotein is a binding protein whose structure is mainly determined by the content of sugars and proteins and the peptide bonds to which it binds. There are many kinds of glycoproteins, and they can be classified into lectin, hormone, enzyme and immunoglobulin according to the clinical role in the medical field. Glycoproteins have a variety of biological functions and are of great significance in the medical and biological fields. In order to study the biological ...
Source: Chinese Journal of Analytical Chemistry - September 13, 2019 Category: Chemistry Source Type: research

New Methods for Cell Cycle Analysis
Publication date: September 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 9Author(s): Han-Shu FANG, Ming-Fei LANG, Jing SUNAbstractCell cycle is a basic process during the cell life. Analyzing cell cycles can better understand the nature of diseases. Currently, cell cycles are mainly analyzed by flow cytometry to investigate intracellular DNA contents and cell cycle specific proteins. With the development of technology, several new methods have emerged for cell cycle analysis in recent years to improve and enhance image analysis, single-cell analysis, sample reduction, and high throughput. These new...
Source: Chinese Journal of Analytical Chemistry - September 13, 2019 Category: Chemistry Source Type: research

Preparation of Tungstotellurate(VI)-coated Magnetic Nanoparticles for Separation and Purification of Ovalbumin in Egg White
Publication date: September 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 9Author(s): Zheng CHE, Shi-Yu YUE, Nan WU, Jia-Wei XU, Qing CHENAbstractTungstotellurate(VI)-coated magnetic nanoparticles (MNP) were prepared by immobilization of tungstotellurate(VI) salt onto the surface of branched polyethyleneimine (PEI)-modified magnetic nanoparticles via electrostatic interaction. The structure and composition of TeW@MNP were confirmed by characterization with FT-IR, EDS and SEM. The obtained TeW@MNP composite had proven to be a promising adsorbent for the adsorption of ovalbumin in egg whites. Approxim...
Source: Chinese Journal of Analytical Chemistry - September 13, 2019 Category: Chemistry Source Type: research

Molecularly Imprinted Photonic Hydrogels for Visual Detection of Methylanthranilate in Wine
Publication date: September 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 9Author(s): Wei-Zhen WU, Meng-Xia HUANG, Qing-Da HUANG, Cai-Hua LYU, Jia-Ping LAI, Hui SUNAbstractMethylanthranilate (MA) is a kind of spice that is illegally added in the wine in China. The determination of MA in wine is an important part of quality control for wine production. Therefore, it is of great significance to develop a rapid method for detection of prohibited spice in wine. In this work, an inverse opal structural molecularly imprinted photonic hydrogels (MIPHs) membrane was fabricated by merging the advantages of p...
Source: Chinese Journal of Analytical Chemistry - September 13, 2019 Category: Chemistry Source Type: research

Accurate Determination of Harmful and Doping Elements in Soft Magnetic Ferrite Powders Using Inductively Coupled Plasma Tandem Mass Spectrometry
This study demonstrates a new approach for harmful and doping elements in soft magnetic ferrite powders with great convenience and high accuracy. (Source: Chinese Journal of Analytical Chemistry)
Source: Chinese Journal of Analytical Chemistry - September 13, 2019 Category: Chemistry Source Type: research

Simultaneous Detection of Hydroquinone, Catechol and Resorcinol by an Electrochemical Sensor Based on Ammoniated-Phosphate Buffer Solution Activated Glassy Carbon Electrode
Publication date: September 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 9Author(s): Hong-Ying LIU, Lang-Lang ZHU, Zhi-Heng HUANG, Yu-Bing QIU, Han-Xiao XU, Jia-Jun WEN, Wei-Wei XIONG, Li-Hua LI, Chun-Chuan GUAbstractAn electrochemical sensor was successfully fabricated by coupled ammoniated modification with PBS activation on glassy carbon electrodes (CA-GCE) and characterized by electrochemical impedance spectra. The CA-GCE showed outstanding electrochemical performance, and was applied to simultaneous detection of resorcinol (RC), catechol (CC) and hydroquinone (HQ), which could be ascribed to n...
Source: Chinese Journal of Analytical Chemistry - September 13, 2019 Category: Chemistry Source Type: research

Determination of Pyrethroids and Phthalate Esters in Radix et Rhizoma Glycyrrhizae by Successive Ultrasonic-assisted Extraction and Dispersive Liquid-Liquid Microextraction Followed by Gas Chromatography-Mass Spectrometry
Publication date: September 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 9Author(s): Yan-Fen ZHOU, Ze-Lan WANG, Zhe MENG, Xiu-Qin MEN, Ji-Guang LI, Wan-Yi LIUAbstractA rapid, inexpensive and efficient sample preparation method for simultaneous extraction and determination of three pyrethroids and seven phthalate esters in Radix et Rhizoma Glycyrrhizae samples was developed. The target analytes were extracted using a two-step extraction method including ultrasonic-assisted extraction and dispersive liquid-liquid microextraction coupled with gas chromatography-mass spectrometry (GC-MS). In ultrasonic...
Source: Chinese Journal of Analytical Chemistry - September 13, 2019 Category: Chemistry Source Type: research

Application of Matrix-Assisted Laser Desorption/Ionization Mass Spectrometric Imaging in Analysis of Medicinal Plants
Publication date: August 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 8Author(s): Fang LIU, Lin ZHANG, Zhi-Xin ZHANG, Si-Chun ZHANGAbstractAs a soft ionization mass spectrometry technique, matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) can quickly and reliably obtain information of molecular composition and structure from plant tissues, especially the information of component distribution through imaging. Therefore, it has attracted more and more attention in the analysis of medicinal plants. In this paper, the application of MALDI-MS imaging technology in the analysis of ...
Source: Chinese Journal of Analytical Chemistry - August 22, 2019 Category: Chemistry Source Type: research

Preparation Methods for Phospholipid Vesicle Arrays and Their Applications in Biological Analysis
Publication date: August 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 8Author(s): Xue-Jing WANG, Wei MU, Xiao-Jun HANAbstractLipid vesicles, composed of cell membrane components, are not only used as an artificial cell model to mimic cell structure and functions, but also widely used in biological analysis. Liposome (phospholipid vesicle) array is a high throughput platform for protein screening and bio-sensing. This review focuses on the preparation methods of homogeneous small lipid vesicle array, heterogeneous small lipid vesicle array, and giant lipid vesicle array, as well as their application...
Source: Chinese Journal of Analytical Chemistry - August 22, 2019 Category: Chemistry Source Type: research

Capture of Circulating Tumor Cells by Hydrogel-Nanofiber Substrate
Publication date: August 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 8Author(s): Zhi-Li WANG, Pi DING, Tian GAO, Chang-Chong CHEN, Yi CAO, Na SUN, Ren-Jun PEIAbstractThe method for detection of circulating tumor cells (CTCs) is considered as a promising cancer liquid biopsy technique. However, due to the rarity and heterogeneity, it is still a challenging task to capture CTC with high purity and viability from blood for the following enumeration and molecular analysis. Herein, we fabricated a hydrogel-chitosan nanofiber substrate to effectively capture the target cancer cells, assisted by the poly...
Source: Chinese Journal of Analytical Chemistry - August 22, 2019 Category: Chemistry Source Type: research

Preparation and Properties Study of Inclusion Complex of Triptonide with 2,6-Dimethyl-β-cyclodextrin
Publication date: August 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 8Author(s): Wen JIN, Fei-Yang LI, Yu-Rong HUANG, Hui-Wen YANG, Shao-Ming CHI, Hong-You ZHU, Ze LEI, Yan ZHAOAbstractThe inclusion complex of Triptonide (TN) and 2,6-dimethyl-β-cyclodextrin (DM-β-CD) was prepared by saturated aqueous solution method. The TN/DM-β-CD inclusion complex was characterized by Fourier transform infrared spectrometry (FTIR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA), and the possible inclusion mode was inferred by 1H nuclear magn...
Source: Chinese Journal of Analytical Chemistry - August 22, 2019 Category: Chemistry Source Type: research

Detection of Tadalafil and Its Analogues in Health Wine and Oral Liquid by Microwell Lateral Flow Immunochromatography Assay
Publication date: August 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 8Author(s): Ting-Ting ZOU, Jin-Yi YANG, Zhen-Lin XU, Hong WANG, Yuan-Ming SUN, Hong-Tao LEI, Xue-Cai TAN, Yu-Dong SHENAbstractTo monitor illegal addition of tadalafil and its analogues in health food, a new polyclonal antibody was prepared by immunizing New Zealand white rabbits with a common skeleton structure hapten combined with an unsaturated linear alkyl arm hapten strategy, which could simultaneously recognize tadalafil, amino tadalafil and N-Desmethyl tadalafil. A microwell lateral flow immune- chromatographic assay (mwLFI...
Source: Chinese Journal of Analytical Chemistry - August 22, 2019 Category: Chemistry Source Type: research

Direct Determination of Ascorbic Acid in Fruits and Vegetables by Positive Scan Polarization Reverse Catalytic Voltammetry
Publication date: August 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 8Author(s): Pan PAN, Shou-Guo WUAbstractThe positive scan polarization reverse catalytic voltammetry was used for direct detection of ascorbic acid in fruit and vegetable samples. An ascorbic acid sensor was fabricated based on CuxO nanoparticles protected by the graphene oxide (GO) layer. The common copper electrode was first electrooxidized in strong alkaline solution to generate CuxO nanoparticles on the electrode surface, then GO was electrodeposited to form a protective layer covered on the surface of CuxO nanoparticles. The...
Source: Chinese Journal of Analytical Chemistry - August 22, 2019 Category: Chemistry Source Type: research

A Novel Genistein Electrochemical Sensor Based on Molecularly Imprinted Polycarbazole/Carboxylated Multiwalled Carbon Nanotubes Nanocomposite
Publication date: August 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 8Author(s): Li-Ting NIU, Gen-Gen LI, Hai-Feng LI, Fan CUI, Jing ZHANG, Ying HUANG, Kai CHEN, Jian-Fu ZHANG, Wen-Fei LI, Wei-Lu LIUAbstractGenistein is an important isoflavone that has been widely used to prevent blood disease and cancer. In this work, a novel genistein electrochemical sensor was developed based on the composite of molecularly imprinted polymer (MIP) and carboxylated multiwalled carbon nanotubes (cMWCNTs). The MIP layer was electropolymerizated on the cMWCNTs modified electrode using carbazole as functional monome...
Source: Chinese Journal of Analytical Chemistry - August 22, 2019 Category: Chemistry Source Type: research

Facile Fabrication of Gold Functionalized Nanopipette for Nanoscale Electrochemistry and Surface Enhanced Raman Spectroscopy
Publication date: August 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 8Author(s): Hong-Na LI, Dan YANG, Ao-Xue LIU, Guo-Hui LIU, Yu-Ping SHAN, Guo-Cheng YANG, Jin HEAbstractNanopipette has emerged as a versatile nanosensor. It is desirable to expand the sensing capabilities of nanopipette by integrating multiple sensing methods into one nanopipette. In this work, we presented a seeded growth approach to facilely, cheaply and quickly deposit a gold layer with controllable length at the inner surface of the nanopipette tip. The deposited gold formed a wireless ring-shape gold nanoelectrode at the nan...
Source: Chinese Journal of Analytical Chemistry - August 22, 2019 Category: Chemistry Source Type: research

Progress of Microfluidics Based on Printed Circuit Board and its Applications
Publication date: July 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 7Author(s): Yong-Jia CHANG, Hui YOUAbstractCommercialization is the current major theme of microfluidics. Since lab-on-printed circuit board (lab-on-PCB) can integrate PCB technology and polymer microfluidic manufacturing process, a low-cost, standardized and mass productive platform has been formed to promote commercialization efficiently. In this paper, we summarized the research of lab-on-PCB in the past 20 years and reviewed the progresses from structures, materials and fabrication methods according to the analysis of typical l...
Source: Chinese Journal of Analytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Application of Vacuum Ultraviolet Single-photon Ionization Mass Spectrometer in Online Analysis of Volatile Organic Compounds
Publication date: July 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 7Author(s): Wan-Qi SUN, Yong ZHANG, Shuang-Xi FANGAbstractA vacuum ultraviolet single-photon ionization mass spectrometer, which has the merits of broad-spectrum soft ionization, low fragment peak, low matrix influence, high sensitivity and short response time, is fit for use in the online analysis of mixed volatile organic compounds. In this review, the theory and structural composition of the single-photon ionization mass spectrometer are described, and the current research progress of sampling systems, ionization sources, and ma...
Source: Chinese Journal of Analytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Preparation of Aptamer-functionalized Au@pNTP@SiO2 Core-Shell Surface-enhanced Raman Scattering Probes for Raman Imaging Study of Adhesive Tape Transferred-Latent Fingerprints
Publication date: July 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 7Author(s): Yang-Yang ZHOU, Yu-Mei DU, Xiao-Jun BIAN, Juan YANAbstractThe core-shell SERS nanoprobe combined with adhesive tape was used to recognize the latent fingerprints on the surface of the object, which provides an effective solution for the imaging of latent fingerprints on the surface of large immobile or curved objects. First, the Au@pNTP@SiO2 SERS probes modified by aptamers specific to lysozyme were prepared, and characterized by TEM/EDS, and its SERS effects were also tested. Then the probe was incubated with the aged-...
Source: Chinese Journal of Analytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Rapid Separation and Precise Determination of Strontium Isotopic from Geological Samples with High Rubidium/Strontium Ratios
In this study, the conventional two-stage separation process was optimized, and an experimental method for rapid separation of Sr from geological samples with high Rb/Sr ratios was established. In this method, the Sr solution after purified by AG50 resin was directly added to a new AG50 resin to purify Rb and Sr again. The whole separation process would be accomplished quickly and efficiently. The method combined with highly sensitive thermal ionization mass spectrometer (TIMS) technique was completely satisfied in high precision determination of 87Sr/86Sr isotope ratio in the samples with high Rb/Sr ratios. Through the ap...
Source: Chinese Journal of Analytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research

An Electronic Nose Based on Copper Oxide Heterojunctions for Rapid Assessment of Liquor
Publication date: July 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 7Author(s): Kang LIANG, Yu WANG, Jia-Qi HE, Hu MENG, Shu-Qin CHEN, Jun-Yu CHANG, Jian-Mei GAO, Ji-Hui WANG, Liang FENGAbstractThe novel methods for rapid detection and discrimination of aroma have gained huge attentions not only because of the growing demands for food safety supervision, but also due to their high potentials in monitoring and regulating fermentation process in food production. In this work, a prototype of electronic nose was developed by eight metal oxide semiconductor gas sensors which were fabricated based on two...
Source: Chinese Journal of Analytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Modulating Nanoparticle Translocation by Surface Chemistry of Gold Nanopores
Publication date: July 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 7Author(s): Ao-Xue LIU, Dan YANG, Hong-Na LI, Guo-Hui LIU, Qiang FU, Yu-Ping SHAN, Guo-Cheng YANG, Jin HEAbstractA simple and effective method for modulating nanoparticles (NPs) translocation through nanopore by tuning the surface change of chemically modified gold coated nanopore was developed. The gold-coated pore is simply prepared from a nanopipette and the partially insulated gold coating can be utilized to effectively concentrate NPs near the nanopore entrance. The surface modification of gold near the orifice effectively mod...
Source: Chinese Journal of Analytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Advances in Microdroplet Generation Methods
Publication date: June 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 6Author(s): Yu-Yao WEI, Zi-Qiao SUN, Hao-Hui REN, Lei LIAbstractMicrodroplets have been widely used in biology, chemistry, material science and engineering, and the microdroplet generation methods are becoming more efficient and controllable. The development of the generation of microdroplets experienced tradition methods, microfluidic chip-based methods, and off-chip methods proposed recently. In this review, we first briefly summarized the typical traditional methods and the microfluidic chip-based methods for microdroplet genera...
Source: Chinese Journal of Analytical Chemistry - June 12, 2019 Category: Chemistry Source Type: research

Research and Application Progress of Micellar Electrokinetic Chromatography in Separation of Proteins
Publication date: June 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 6Author(s): Fan GAO, Xiao-Fei WANG, Bo ZHANGAbstractMicellar electrokinetic chromatography (MEKC) is a hybrid of chromatography and electrophoresis. The separation mechanism is based on the interaction of analytes and pseudo-stationary phase and also the differential mobility in the electric field. Such property of MEKC can be made good use for separation of proteins and peptides, which have high dimensionality. In the past years, either in the form of single dimensional or multi-dimensional separations, MEKC has demonstrated its e...
Source: Chinese Journal of Analytical Chemistry - June 12, 2019 Category: Chemistry Source Type: research

High Performance Micro Gas Chromatography Column Using Mesoporous Silica as Stationary Phase
Publication date: June 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 6Author(s): Xue-Lei YANG, Bin ZHAO, Fei FENG, Hai-Mei ZHOU, Heng YANG, Xin-Xin LIAbstractA semi-packed micro gas chromatography (μGC) column embedded micro-elliptical pillars was fabricated based on micro- electro-mechanical system (MEMS) technique. The mesoporous silica (MS) film with 2-nm pore size and large specific surface area was coated on the inner surface of the μGC column as stationary phase. A baseline separation of alkanes (C5–C10) was realized by the μGC column which used MS as stationary phase, and the r...
Source: Chinese Journal of Analytical Chemistry - June 12, 2019 Category: Chemistry Source Type: research

Determination of Ten Kinds of Monohydroxylated Polycyclic Aromatic Hydrocarbons in Human Urine by Supported Liquid Extraction Followed by Liquid Chromatography-Tandem Mass Spectrometry
Publication date: June 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 6Author(s): Ting SHANG, Ling-Juan ZHAO, Pei LI, Xiang-Ying ZENG, Zhi-Qiang YUAbstractThe monitoring of urinary monohydroxylated polycyclic aromatic hydrocarbons (OH-PAHs) can be used for risk assessment of human exposure to polycyclic aromatic hydrocarbons (PAHs). In this work, we developed a novel pretreatment method based on supported liquid extraction (SLE) for determination of 10 kinds of OH-PAHs by liquid chromatography- tandem mass spectrometry (LC-MS/MS). Urine samples were extracted with a mixed solvent of dichloromethane/n...
Source: Chinese Journal of Analytical Chemistry - June 12, 2019 Category: Chemistry Source Type: research

Determination of Stable Nitrogen and Oxygen Isotope Ratios in Atmospheric Aerosol Nitrates
This study provided a novel method for better understanding emission sources and transformation pathways of atmospheric nitrate.Graphical AbstractSeveral conditions of two-step chemical reduction method for simultaneously determination of nitrogen and oxygen isotope(d15N and d18O)of atmospheric nitrate particles, were optimized. An optimal scheme for accurately determining the d15N and d18O of the NO3- of the aerosol was developed. (Source: Chinese Journal of Analytical Chemistry)
Source: Chinese Journal of Analytical Chemistry - June 12, 2019 Category: Chemistry Source Type: research

Sensitive Fluorescent Assay for Determination of Cu2+ in Aqueous Solution Using Isorhamnetin-β-cyclodextrin Inclusion
Publication date: June 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 6Author(s): Shi-Long YANG, Wei-Na JIANG, Ying TANG, Li XU, Bu-Hong GAO, Hai-Jun XUAbstractA fluorescent probe based on isorhamnetin (Iso)-cyclodextrin (CD) inclusion for detecting Cu2+ was synthesized. A major fluorescence emission peak at 542 nm was observed for isorhamnetin (Iso) in buffer solution (pH 7.40) when the excitation wavelength was 390 nm. It was surprisingly found that (2-hydroxypropyl)-β-cyclodextrin (β-CD) could enhance the fluorescence intensity of Iso, and the major fluorescence peak was shifted to 557 n...
Source: Chinese Journal of Analytical Chemistry - June 12, 2019 Category: Chemistry Source Type: research

Prussian Blue Analogue of Copper-Cobalt Decorated with Multi-Walled Carbon Nanotubes Based Electrochemical Sensor for Sensitive Determination of Nitrite in Food Samples
Publication date: June 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 6Author(s): Hong-Ying LIU, Jia-Jun WEN, Zhi-Heng HUANG, Huan MA, Han-Xiao XU, Yu-Bin QIU, Wei-Jie ZHAO, Chun-Chuan GUAbstractCu-Co Prussian Blue analogue (CuII3[CoIII(CN)6]2)/multi-walled carbon nanotubes (Cu-Co PBA/MWCNTs) composite was synthesized for fabrication of an electrochemical sensor for detection of nitrite. The morphology and composition of the fabricated nanomaterial were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), and scanning electron microscopy (SEM). Cyclic voltammetry (CV)...
Source: Chinese Journal of Analytical Chemistry - June 12, 2019 Category: Chemistry Source Type: research

Expansion Microscopy Imaging Technique and Its Application
Publication date: May 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 5Author(s): Kai CHEN, Ying-Chun ZHANG, Guan-Fang ZHAOAbstractDue to the limitations of optical diffraction, traditional optical microscopes have insufficient resolution to observe subcellular microstructures. Super-resolution microscopy, awarded the Nobel Prize in Chemistry in 2014, has been used extensively in single-molecule imaging of microstructures. As a new super-resolution microscopy, expansion microscopy (ExM) has the advantages of short imaging time and can mark dense biological macromolecules. This paper describes the imag...
Source: Chinese Journal of Analytical Chemistry - May 11, 2019 Category: Chemistry Source Type: research

Microchannel with Stacked Microbeads for Separation of Plasma from Whole Blood
Publication date: May 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 5Author(s): Meng-Di CHEN, Yan-Ting YANG, Zhi-Yang DENG, Hong-Yan XU, Ji-Nan DENG, Zhong YANG, Ning HU, Jun YANGAbstractA microfluidic device integrated with a microchannel stacked by two kinds of microbeads with different sizes and a capillary microchannel array was designed and fabricated. When whole blood sample flowed through these channels, blood cells were filtered and adsorbed by the stacked microbeads, and plasma could be separated rapidly. The microbeads were introduced into the channel by negative pressure and thus stacked ...
Source: Chinese Journal of Analytical Chemistry - May 11, 2019 Category: Chemistry Source Type: research

Facile Synthesis of Biocompatible Fe3O4-Based Nanoparticles for pH-Responsive Dual-Model Magnetic Resonance Imaging-Guided Tumour Eradication by Photothermal Therapy
Publication date: May 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 5Author(s): Jian-Hua LIU, Lei WANG, Tian-Qi ZHANG, Jian-Qiu WANG, Xue GONG, Feng-Zhi CUI, Jian-Jun ZHENG, Bo LI, Zhan SHIAbstractThe accurate and early diagnosis is very important for the successful treatment of tumours. However, a single mode of magnetic resonance imaging (MRI) is difficult to satisfy the high requirements of accurate diagnosis owing to the inherent defects. Herein, we constructed a kind of poly(acrylic) acid (PAA) modified Fe3O4@MnO2 nanoparticles (Fe3O4@MnO2@PAA NPs) for the pH-responsive T1/T2 dual-model MRI gui...
Source: Chinese Journal of Analytical Chemistry - May 11, 2019 Category: Chemistry Source Type: research

Research and Application of Mass Spectrometry with Low Energy Electron Impact Ionization Source
Publication date: May 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 5Author(s): Guang-Cai LIU, Xiao-Yun GONG, You JIANG, Yi-Qing PIAO, Xiang FANG, Ze-Jian HUANG, Di TIANAbstractThe changes of concentrations of O2 and CO2 in tail gas of fermentation industry reflect some important physiological and metabolic parameters in the fermentation process. Monitoring of the tail gas of fermentation has important significance for guiding the fermentation process. However, traditional monitoring methods are time-consuming with low precision and poor versatility, and are not suitable to monitor fermentation tail...
Source: Chinese Journal of Analytical Chemistry - May 11, 2019 Category: Chemistry Source Type: research

Determination of 10 Kinds of Caine-Type Prohibited Ingredients in Cosmetics by Ultra-Performance Liquid Chromatography-Differential Mobility Spectrometry-Mass Spectrometry
Publication date: May 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 5Author(s): Xian-Hui LIAN, Chun WANG, Xian-Shuang MENG, Hua BAI, Xiao-Jie SUN, Hong-Yu XUE, Qiang MAAbstractAn analytical method for determination of 10 kinds of caine-type prohibited ingredients in cosmetics was developed. The analytes were enriched through supramolecular solvent-based dispersive liquid-liquid microextraction, followed by instrumental analysis with ultra performance liquid chromatography coupled with differential mobility spectrometry-mass spectrometry. The supramolecular solvent was prepared with dodecanol as extr...
Source: Chinese Journal of Analytical Chemistry - May 11, 2019 Category: Chemistry Source Type: research

Development of A Fiber-Packed In-Tube Extraction Device and Its Application in BTEX Analysis
Publication date: May 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 5Author(s): Bo ZHU, Xiao-Yang GUO, Xi-Yue WANG, Li-Li LIAN, Hao ZHANG, Wen-Xiu GAO, Yuan-Yuan TIAN, Xiao-Yu ZHANG, Da-Wei LOUAbstractA fiber-packed in-tube extraction device was developed with heat-resistant fibers coated with molecularly imprinted polymer as adsorbent for concentration detection of volatile organic compounds (VOCs). The coated fibers were longitudinally packed into a filling chamber. The inner diameter of the filling chamber was 3 mm and its length was 2.5 cm. The filling chamber was connected to gas chromatography...
Source: Chinese Journal of Analytical Chemistry - May 11, 2019 Category: Chemistry Source Type: research

Progress and Applications of Multivariate Calibration Model Transfer Methods
Publication date: April 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 4Author(s): Yun-Ying SHI, Jing-Yan LI, Xiao-Li CHUAbstractThe combination of multivariate calibration and spectroscopic analysis technology can achieve the rapid analysis of substance. However, when the external environmental conditions such as instruments or accessories are replaced or temperature changed, the current master calibration may be “invalid”. Recalibration usually takes a lot of time and financial resources. The development of calibration transfer techniques can solve this problem well, and the adaptabilit...
Source: Chinese Journal of Analytical Chemistry - April 11, 2019 Category: Chemistry Source Type: research

Screening of Oligonucleotide Aptamers and Application in Detection of Pesticide and Veterinary Drug Residues
Publication date: April 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 4Author(s): Xue-Mei ZOU, Jia-Wei ZHOU, Shang-Hong SONG, Guan-Hua CHENAbstractAptamers are a type of single stranded short deoxyribonucleic acid or ribonucleic acid sequences screened from a random oligonucleotide library, which have high affinity and specific recognition for specific target molecules. Since the advent of screening process called the systematic evolution of ligands by exponential enrichment (SELEX), there have been various SELEX-based improved screening processes and capillary electrophoresis-based SELEX or non-SEL...
Source: Chinese Journal of Analytical Chemistry - April 11, 2019 Category: Chemistry Source Type: research

Microfluidic Array Liquid Chromatography: A Proof of Principle Study
In this study, a microfluidic chip-based array liquid chromatographic platform enabling multicolumn separation and detection was developed. The platform is based on the combination of glass, poly(methyl methacrylate) (PMMA) and polydimethylsiloxane (PDMS) chips and up to 8 packed chromatographic channels were manufactured on such a microfluidic device. Pressurization experiments showed that the array chip could be reliably used under pressure-driven liquid chromatographic mode. A nanoflow of 300 nL min–1 per column was realized through multi-stage flow splitting. We investigated the feasibility and effectiveness of 8...
Source: Chinese Journal of Analytical Chemistry - April 11, 2019 Category: Chemistry Source Type: research

Orange Luminescent Carbon Dots as Fluorescent Probe for Detection of Nitrite
Publication date: April 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 4Author(s): Jing JIA, Wen-Jing LU, Lin LI, Yuan JIAO, Yi-Fang GAO, Shao-Min SHUANGAbstractOrange luminescent nitrogen doped carbon dots (N-CDs) were prepared via one-step hydrothermal treatment with p-phenylenediamine and citric acid as precursors. The morphology and optical properties of the N-CDs were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectra (FTIR), ultraviolet-visible absorption spectroscopy (UV-vis) and fluorescence (FL) spectroscopy. The synthesized N-CDs had an extreme small...
Source: Chinese Journal of Analytical Chemistry - April 11, 2019 Category: Chemistry Source Type: research

Analysis of Near-Infrared Spectra of Coal Using Deep Synergy Adaptive Moving Window Partial Least Square Method Based on Genetic Algorithm
Publication date: April 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 4Author(s): Sheng-Hao WANG, Yong ZHAO, Rong HU, Yu-Yan ZHANG, Xin-Hua HANAbstractSpectral analysis is one of the available methods for rapid measurement of the common important properties of coal. Many studies on the spectral analysis of coal have been reported; however, it is still unknown whether the optimal coal quantitative calibration mode can be obtained from full spectrum or by selecting wavelength variables. In addition, the data preprocessing methods and their parameters are always determined by trial and error or experie...
Source: Chinese Journal of Analytical Chemistry - April 11, 2019 Category: Chemistry Source Type: research

An Ultrasensitive Real-time Immuno-polymerase Chain Reaction Assay for Detection of Tetrabromobisphenol A in PM2.5 Particles Using Functionalized Nanoprobes
Publication date: April 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 4Author(s): Zhen MA, Hui-Sheng ZHUANG, Guang-Xin YANGAbstractTetrabromobisphenol A (TBBPA), a type of brominated flame retardant, is widely distributed in the environment. In this work, different TBBPA antigens and polyclonal anti-TBBPA antibody (pAb-TBBPA) were prepared, and on the basis of this, an ultrasensitive real-time immuno-polymerase chain reaction for TBBPA detection using functionalized nanoprobes (FNPs-IPCR) was developed. Gold nanoparticles modified with thiol-capped DNA and pAb-TBBPA were prepared as antibody-DNA con...
Source: Chinese Journal of Analytical Chemistry - April 11, 2019 Category: Chemistry Source Type: research

Applications of High-Resolution Mass Spectrometry in Determination of Chlorinated Paraffins
Publication date: March 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 3Author(s): Xiao-Mei HUANG, Yang WU, Jun-Tao CUI, Fu-Hua WANG, Xu WANG, Ya-Fei LI, Wei-Yun WUAbstractChlorinated paraffins (CPs) are a new class of persistent organic pollutants and have aroused great concern of many environmental scientists, due to their ubiquity in various environmental media and biotas. Given their relative low levels in environmental samples, CPs need to be enriched and cleaned up before instrumental analysis. CPs consist of thousands of congeners and isomers, thus posing grand challenges to eliminate the mass...
Source: Chinese Journal of Analytical Chemistry - March 9, 2019 Category: Chemistry Source Type: research

Research Advances in Ambient Ionization and Miniature Mass Spectrometry
Publication date: March 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 3Author(s): Xiang-Yu GUO, Xue-Mei HUANG, Jun-Feng ZHAI, Hua BAI, Xiao-Xu LI, Xiao-Xiao MA, Qiang MAAbstractThe development and applications of ambient ionization and miniature mass spectrometry are current research focus in chemical measurement. The analytical technology based on the combination of ambient ionization and miniature mass spectrometry can bypass chromatographic separation and eliminate or simplify sample pretreatment process. The protocol can reverse the labor-intensive and time-consuming drawbacks of traditional ana...
Source: Chinese Journal of Analytical Chemistry - March 9, 2019 Category: Chemistry Source Type: research

Simultaneous Determination of Glutamate and Calcium Ion in Rat Brain during Spreading Depression and Ischemia Processes
This study provided a simple and effective approach for in vivo analysis of two or more chemical substances.Graphical abstractA dual function microelectrode (DFME) biosensor was designed and developed for simultaneous determination of glutamate and Ca2+, and was successfully applied for real-time monitoring of glutamate and Ca2+ in live rat brain during spreading depression (SD) and ischemia processes. (Source: Chinese Journal of Analytical Chemistry)
Source: Chinese Journal of Analytical Chemistry - March 9, 2019 Category: Chemistry Source Type: research

Study on Molecular Recognition of Pinocembrin with Methylated-β-Cyclodextrin
Publication date: March 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 3Author(s): Yao DU, Shu-Ya ZHOU, Yun-Han YANG, Jun-Li YANG, Wen CHEN, Li-Juan YANGAbstractThe inclusion behavior, inclusion capacity and inclusion mode of pinocembrin (PIN) with dimethyl-β-cyclodextrin (DM-β-CD) and trimethyl-β-cyclodextrin (TM-β-CD) were characterized by X-ray diffraction (XRD), thermal analysis, scanning electron microscopy (SEM), UV-visible spectral titration and molecular docking. The results showed that the packing ratio of PIN/DM-β-CD complex and PIN/TM-β-CD complex was 1:1. The...
Source: Chinese Journal of Analytical Chemistry - March 9, 2019 Category: Chemistry Source Type: research

Accurate Determination of Lithium Isotopic Compositions in Geological Samples by Multi-collector Inductively Coupled Plasma-Mass Spectrometry
In this study, a method contained preparation of geological materials (water and rock) and accurate determination of Li isotopic composition was set up. The separation of Li from water and rock samples was implemented by a single column containing 1.5 mL of Bio-Rad AG 50W-X12 (200–400 mesh) resin, with 0.40 M HCl and 1.0 M HCl as eluents. Only 8.5 and 14 mL of eluents were used to separate Li from water and rock samples with this method, respectively. Blank signal of the operation procedure was (2.4 ± 0.1) mV, which was almost same as the 2.3 mV of the 2% HNO3 signal used in this study. Experimental results sh...
Source: Chinese Journal of Analytical Chemistry - March 9, 2019 Category: Chemistry Source Type: research

Spectroscopic and Molecular Docking Approaches for Investigation of Interaction of Phellopterin with Human Serum Albumin
Publication date: March 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 3Author(s): Tuan-Wu CAO, Xiao-Ping TAN, Lu-Ping HUANG, Jian-Wei SHI, Gang XUAbstractThe mechanism of interaction between human serum albumin (HSA) and natural product phellopterin (PL) from Angelica dahurica was investigated by spectroscopic techniques with molecular docking under simulated physiological conditions. The experimental results showed that the fluorescence of HSA was regularly quenched by PL, and the quenching constants (KSV) decreased with increasing temperature, which indicated that the quenching mechanism was a sta...
Source: Chinese Journal of Analytical Chemistry - March 9, 2019 Category: Chemistry Source Type: research

Advances in Microfluidic Biosensors Based on Luminescent Bacteria
Publication date: February 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 2Author(s): Xiao-Wei JIN, Zhe-Yu LI, Pian-Pian XU, Xiao-Yan ZHANG, Nan-Qi REN, Vitaliy V. Kurilenko, Kai SUNAbstractLuminescent bacteria can emit visible light at 450–490 nm, and its luminous intensity decreases with the increase of the concentration of toxic substances in test solution. The method using luminescent bacteria is widely used in acute toxicity analysis of water quality because it is a simple, rapid and low-cost way. In recent years, biosensors based on luminescent bacteria have attracted more and more attent...
Source: Chinese Journal of Analytical Chemistry - February 9, 2019 Category: Chemistry Source Type: research

Titanium Dioxide-Yttrium(III)-Oxide Composite Based Cataluminescence Gas Sensor for Fast Detection of Propylene Oxide
Publication date: February 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 2Author(s): Ming LI, Jing-Ye CHEN, Yu-Fei HU, Gong-Ke LIAbstractBy using nano TiO2-Y2O3 as catalyst, cataluminescence (CTL) phenomenon of propylene oxide (PO) was studied, and it was found that the sensor has high sensitivity and good selectivity for the detection of propylene oxide. The common volatile organic compounds (VOCs) such as acetone, acetaldehyde and benzene show no response to the catalysis of TiO2-Y2O3. Based on this phenomenon, a propylene oxide CTL sensor was designed. The ratio of TiO2 and Y2O3 and the annealed ...
Source: Chinese Journal of Analytical Chemistry - February 9, 2019 Category: Chemistry Source Type: research

Fabrication of Electrochemical Sensor Modified with Porous Graphene for Determination of Trace Calycosin
This study provided a novel analytical method for detection of CYS, rapid identification of Radix Hedysari and Radix Astragali, and gave another way for the trace analysis of CYS in biological samples. Furthermore, it would also deepen the application of PG in the field of pharmaceutical analysis.Graphical AbstractIt is significant to establish a simple, fast and precise analytical method for analysis of calycosin content in herbal materials, herbal preparations and human blood with the minimum blood concentration to realize the quality control of Chinese medicine and the diagnosis of diseases. This study provided a novel ...
Source: Chinese Journal of Analytical Chemistry - February 9, 2019 Category: Chemistry Source Type: research

Study of Electrooxidation Behavior of Nitrite on Gold Nanoparticles/Graphitizing Carbon Felt Electrode and Its Analytical Application
Publication date: February 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 2Author(s): Wei WEI, Shou-Guo WUAbstractIn this work, a gold nanoparticles/graphitizing carbon felt electrode (AuNPs/GCFE) was fabricated and a disposable sensor was thus fabricated to detect nitrite quickly and conveniently. The kinetic parameters of the electrode were studied in phosphate buffer solution (PBS). Under the optimal conditions, by using cyclic voltammetry, the oxidation peak current was linear with the concentration of nitrite in the range from 1.00 × 10−6 M to 3.35 × 10−3 M, with a detect...
Source: Chinese Journal of Analytical Chemistry - February 9, 2019 Category: Chemistry Source Type: research