Advances in functional nanomaterial-based electrochemical techniques for screening of endocrine disrupting chemicals in various sample matrices
Publication date: Available online 21 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Abdelmonaim Azzouz, Suresh Kumar Kailasa, Pawan Kumar, Evaristo Ballesteros, Ki-Hyun KimAbstractThis review was organized to describe the progress made in the integration of nanostructural materials into electrochemical analytical tools for the quantification of endocrine disrupting chemicals (EDCs) in diverse sample matrices (e.g., environmental and biological samples). Here, we focused mainly on seven major EDCs: alkylphenols/phenols, bisphenol A, parabens, triclosan, phthalates, pesticides, and natural/synthetic sex ...
Source: TrAC Trends in Analytical Chemistry - February 22, 2019 Category: Chemistry Source Type: research

Immunosorbents in microextraction
The objective of this review is to present the developments proposed these last years in the field of microextraction methods involving antibodies.Graphical abstract (Source: TrAC Trends in Analytical Chemistry)
Source: TrAC Trends in Analytical Chemistry - February 22, 2019 Category: Chemistry Source Type: research

Are ecosystem services provided by insects "bugged" by micro(nano) plastics?
Publication date: Available online 21 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Miguel Oliveira, Olga M.C.C. Ameixa, Amadeu M.V.M. SoaresAbstractAlthough the study of the effects of microplastics increased in the last years, terrestrial ecosystems remain less studied. In fact, the effects of microplastics in insects, the most abundant group of animals and major providers of key Ecosystem Services, are not well known despite the potential cascading negative effects on the ecosystems functioning in the habitats where they occur.In this paper, a revision on available studies on microplastics contamina...
Source: TrAC Trends in Analytical Chemistry - February 22, 2019 Category: Chemistry Source Type: research

Optical detection of waterborne pathogens using nanomaterials
Publication date: Available online 22 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Neha Bhardwaj, Sanjeev K. Bhardwaj, Deepanshu Bhatt, Dong Kwon Lim, Ki-Hyun Kim, Akash DeepAbstractThe consumption of microbiologically contaminated water poses serious threats to human health in the form of outbreaks of severe waterborne diseases. The accurate detection and identification of microbial pathogens (e.g., bacteria, fungi, viruses, and parasites) in water is thus imperative to prevent such undesirable situations. This review is organized to describe methodological approaches developed for optical sensing sy...
Source: TrAC Trends in Analytical Chemistry - February 22, 2019 Category: Chemistry Source Type: research

State of the art in sample preparation for human breast milk metabolomics—merits and limitations
Publication date: Available online 15 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Dorota Garwolińska, Jacek Namieśnik, Agata Kot-Wasik, Weronika Hewelt-BelkaAbstractHuman breast milk (HBM) contains metabolites that are diverse in chemical structure and concentration. These metabolites range from high-abundance to low-abundance compounds and from polar to nonpolar. This complex nature of HBM makes HBM samples difficult to analyze, especially in global metabolomic studies for the determination and characterization of complete sets of metabolites. In this review, the state of the art in sample prepara...
Source: TrAC Trends in Analytical Chemistry - February 15, 2019 Category: Chemistry Source Type: research

Cold atmospheric plasma-induced chemical vapor generation in trace element analysis by spectrometric methods
Publication date: Available online 15 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Pawel Pohl, Krzysztof Greda, Anna Dzimitrowicz, Maja Welna, Anna Szymczycha-Madeja, Anna Lesniewicz, Piotr JamrozAbstractThe present review surveys original works published in the last decade on unique properties of dielectric barrier discharge (DBD) and atmospheric pressure glow discharge (APGD) operated in contact with solutions for plasma-assisted chemical vapor generation (CVG) of selected elements and their transport to spectrometric detectors like quartz tube atomic fluorescence (QT-AFS), inductively coupled plasm...
Source: TrAC Trends in Analytical Chemistry - February 15, 2019 Category: Chemistry Source Type: research

Green analytical methods of metals determination in biosorption studies
Publication date: Available online 14 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Katarzyna Chojnacka, Marcin MikulewiczAbstractThe paper reviews state-of-the-art in analytical methods designated for determination of metal ions bound to cellular surfaces in biosorption studies. Although there are 13 750 papers on biosorption (ISI Web of Science), none review analytical methods used to characterize this method. Biosorption is the equilibrium process, whereby metal ions are bound to functional groups (carboxyl, sulfhydryl, amino, phosphoryl), which are the components of the cell wall. Different methods...
Source: TrAC Trends in Analytical Chemistry - February 14, 2019 Category: Chemistry Source Type: research

Determination of polycyclic aromatic hydrocarbons in human biological samples: a critical review
Publication date: Available online 14 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Patricia Martín Santos, Miguel del Nogal Sánchez, José Luis Pérez Pavón, Bernardo Moreno CorderoAbstractPolycyclic aromatic hydrocarbons (PAHs) have raised great concern all over the world due to their carcinogenicity and persistence in nature. Exposure to these analytes can be estimated by determining their concentration in biological matrices, allowing PAH levels in the corresponding samples to be extrapolated to those in the environment. In this article we offer a critical review of...
Source: TrAC Trends in Analytical Chemistry - February 14, 2019 Category: Chemistry Source Type: research

Advances in detection of fastidious bacteria: from microscopic observation to molecular biosensors
The objective of this review is to summarize the advantages of the use of biosensors as a modern diagnostic tool in microbiology for detecting fastidious bacteria. (Source: TrAC Trends in Analytical Chemistry)
Source: TrAC Trends in Analytical Chemistry - February 14, 2019 Category: Chemistry Source Type: research

Worldwide trends in tracing poly- and perfluoroalkyl substances (PFAS) in the environment
Publication date: Available online 14 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Shoji F. Nakayama, Mitsuha Yoshikane, Yu Onoda, Yukiko Nishihama, Miyuki Iwai-Shimada, Mai Takagi, Yayoi Kobayashi, Tomohiko IsobeAbstractNumerous poly- and perfluoroalkyl substances (PFAS) have been manufactured and distributed on the world market. Research on PFAS has highlighted their global distribution and impacts on ecosystems and human health. Following regulations and public concern, PFAS production has shifted toward novel molecules in recent years. New classes of PFAS have been identified in the environment an...
Source: TrAC Trends in Analytical Chemistry - February 14, 2019 Category: Chemistry Source Type: research

Multi-objective optimization of microextraction procedures
Publication date: Available online 12 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Marta Bystrzanowska, Marek TobiszewskiAbstractOptimization of extraction process requires finding acceptable conditions for many analytes and good performance in terms of process time or solvent consumption. These optimization criteria are often contradictory to each other, the performance of the system in given conditions is good for some criteria but poor for others. Therefore, such problems require special assessment tools that allow to combine these contradictory criteria into single score to find “the golden ...
Source: TrAC Trends in Analytical Chemistry - February 13, 2019 Category: Chemistry Source Type: research

Mapping human N-linked glycoproteins and glycosylation sites using mass spectrometry
Publication date: Available online 13 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Liuyi Dang, Li Jia, Yuan Zhi, Pengfei Li, Ting Zhao, Bojing Zhu, Rongxia Lan, Yingwei Hu, Hui Zhang, Shisheng SunAbstractN-linked glycoprotein is a highly interesting class of proteins for clinical and biological research. Over the last decade, large-scale profiling of N-linked glycoproteins and glycosylation sites from biological and clinical samples has been achieved through mass spectrometry-based glycoproteomic approaches. In this paper, we reviewed the human glycoproteomic profiles that have been reported in more t...
Source: TrAC Trends in Analytical Chemistry - February 13, 2019 Category: Chemistry Source Type: research

Editorial Board
Publication date: March 2019Source: TrAC Trends in Analytical Chemistry, Volume 112Author(s): (Source: TrAC Trends in Analytical Chemistry)
Source: TrAC Trends in Analytical Chemistry - February 13, 2019 Category: Chemistry Source Type: research

Recent developments and applications of solid phase microextraction as a sample preparation approach for mass-spectrometry-based metabolomics and lipidomics
Publication date: Available online 10 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Nathaly Reyes-Garcés, Emanuela GionfriddoAbstractThis review presents, from a critical perspective, the most remarkable and recent applications of solid-phase microextraction (SPME) as a sample preparation tool for mass-spectrometry-based targeted and untargeted metabolomics and lipidomics. In this review, the advantages and disadvantages of SPME as an approach for extracting/enriching metabolites of interest, either in targeted or untargeted studies, are discussed. In addition, special attention is given to SPME...
Source: TrAC Trends in Analytical Chemistry - February 10, 2019 Category: Chemistry Source Type: research

Human biomonitoring with or without limits? Progress in the analysis of biomarkers of xenobiotics and some opportunities for improved interpretation
Publication date: Available online 10 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Paul T.J. Scheepers, John CockerAbstractThe analysis of body tissues for xenobiotics from occupational and environmental exposures is a rapidly growing field with much societal impact. This use of biomarkers, outside the clinical setting, is referred to as biomonitoring. It informs human health risk assessment by providing information on uptake, bioavailability and bio-activation. Some toxic species are analysed in tissues of first contact such as the lung lining fluid. Other chemical exposures are evaluated by their me...
Source: TrAC Trends in Analytical Chemistry - February 10, 2019 Category: Chemistry Source Type: research

Evaluation of the New European Union Reference Method for Paralytic Shellfish Toxins in Shellfish: A Review of Twelve Years Regulatory Monitoring Using Pre-Column Oxidation LC-FLD
Publication date: Available online 10 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Andrew D. Turner, Robert G. Hatfield, Benjamin H. Maskrey, Myriam Algoet, Jim LawrenceAbstractNaturally-occurring saxitoxins periodically accumulate in shellfish giving rise to Paralytic Shellfish Poisoning. For decades a mouse bioassay has been used for public health protection, but in 2019 a pre-column oxidation LC-FLD method became the official reference method in the European Union. Laboratories are now required to use this method for regulatory monitoring, which will prove challenging. This paper reviews the develo...
Source: TrAC Trends in Analytical Chemistry - February 10, 2019 Category: Chemistry Source Type: research

Recent Development in Sample Preparation Techniques for Plant Hormone Analysis
Publication date: Available online 10 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Yan Liu, Xu’an Fang, Guosheng Chen, Yuxin Ye, Jianqiao Xu, Gangfeng Ouyang, Fang ZhuAbstractPlant hormones are a variety of trace endogenous compounds, playing vital role in plant growth, development and quick response to biotic and abiotic stresses. Precise plant hormone analysis contributes to a better understanding of the regulating network of plant hormone signalling, however, due to the instability and ultra-trace amounts of plant hormones, it is important to select an appropriate pre-treatment method to enri...
Source: TrAC Trends in Analytical Chemistry - February 10, 2019 Category: Chemistry Source Type: research

Application of Nano-ELISA in Food Analysis: Recent Advances and Challenges
Publication date: Available online 10 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Long Wu, Guanghui Li, Xin Xu, Lin Zhu, Riming Huang, Xiaoqiang ChenAbstractOwing to its advantages such as simplicity, good sensitivity and ease of operation, enzyme-linked immunosorbent assay (ELISA) has been a powerful tool in food safety and verification. However, the relatively low sensitivity and accuracy are the main limitations of traditional ELISA, which have hindered its application in food analysis. Thus, it is of ultra-importance to construct effective strategies to solve the problem. Till now, great progress...
Source: TrAC Trends in Analytical Chemistry - February 10, 2019 Category: Chemistry Source Type: research

Magnetic ionic liquids in analytical sample preparation: A literature review
Publication date: Available online 10 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Muhammad SajidAbstractMagnetic ionic liquids (MILs) strongly respond to external magnetic fields in addition to having unique and tunable physiochemical properties of ionic liquids. Unlike ferrofluids, MILs are clean and particle-free magnetic liquids. The careful tailoring of MIL components allows their application as extraction solvents both in hydrophilic and hydrophobic media. The extraction process can be expedited due to magnetically enhanced phase separation of analyte-enriched MILs by eliminating the time-consum...
Source: TrAC Trends in Analytical Chemistry - February 10, 2019 Category: Chemistry Source Type: research

Editorial Board
Publication date: February 2019Source: TrAC Trends in Analytical Chemistry, Volume 111Author(s): (Source: TrAC Trends in Analytical Chemistry)
Source: TrAC Trends in Analytical Chemistry - February 6, 2019 Category: Chemistry Source Type: research

Thin film microextraction: towards faster and more sensitive microextraction
Publication date: Available online 5 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Yekta Arya Olcer, Marcos Tascon, Ahmet E. Eroglu, Ezel BoyaciAbstractThin film microextraction (TFME) is an analytical tool that has been proven to be suitable for integrated sampling and sample preparation of a wide variety of routine and on-site applications. Compared to the traditional microextraction techniques, the most important advantage of TFME is its enhanced sensitivity due to the relatively larger extractive phase spread over a larger surface area. The technique, in this way, facilitates fast extraction kineti...
Source: TrAC Trends in Analytical Chemistry - February 5, 2019 Category: Chemistry Source Type: research

Advanced DNA-based Methods for the Detection of Peanut Allergens in Processed Food
Publication date: Available online 5 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Mengyao Zhang, Ping Wu, Jun Wu, Jianfeng Ping, Jian WuAbstractCurrently, food allergy is a worldwide public health problem, of which peanut allergy is more severe. Peanut allergy is usually lifelong and even trace amount of peanut allergens can cause severe anaphylactic reactions. Nowadays there is no complete cure for sensitized individuals. The dominant prevention is to avoid exposure to peanuts and peanut products. But there are risks of false ingredient labeling and cross-contamination during food processing. Hence, ...
Source: TrAC Trends in Analytical Chemistry - February 5, 2019 Category: Chemistry Source Type: research

Applications of covalent organic frameworks in analytical chemistry
Publication date: Available online 1 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Lixiao Chen, Qi Wu, Jie Gao, Hui Li, Shuqing Dong, Xiaofeng Shi, Liang ZhaoAbstractCovalent organic frameworks (COFs) are an emerging class of porous crystalline materials assembled by symmetric and rigid organic building blocks through strong covalent bonds. COFs have attractive properties such as highly tunable porosity, ordered channels, optional building blocks, predictable control of structures, easy to functionalize. Until now, COFs have attracted increasing attention from researchers due to their versatile applica...
Source: TrAC Trends in Analytical Chemistry - February 2, 2019 Category: Chemistry Source Type: research

Assays for Alkaline phosphatase activity: progress and prospects
Publication date: Available online 1 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Zhenwei Tang, Haotian Chen, Hailun He, Changbei MaAbstractAlkaline phosphatase (ALP) has become a representative enzyme of modern life industries. As a critical biomarker of numerous diseases and a major tool enzyme of experiments, classic methods for ALP assays fail to meet the emerging demand of sensitivity, precision, interference immunity and wide targeted types of sample. Therefore, numerous studies have been made to develop ALP detection strategies to solve these problems. In this view, we summarize and compare the...
Source: TrAC Trends in Analytical Chemistry - February 2, 2019 Category: Chemistry Source Type: research

Is the phase-out of long-chain PFASs measurable as fingerprint in a defined area? Comparison of global PFAS concentrations and a monitoring study performed in Hessen, Germany from 2014-2018
Publication date: Available online 1 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Raphael M. Janousek, Jens Mayer, Thomas P. KnepperAbstractPerfluoroalkyl and polyfluoroalkyl substances (PFASs) represent a group of anthropogenic chemicals that were produced since the 1950s, however, voluntary and legal actions against the use of legacy PFASs were only implemented in recent years. These actions are aimed to trigger certain trends in PFAS chemistry, leading to the introduction of novel PFASs or the fortified use of short-chain derivatives.In order to investigate global trends in PFAS chemistry, relevant...
Source: TrAC Trends in Analytical Chemistry - February 2, 2019 Category: Chemistry Source Type: research

An overview of variable selection methods in multivariate analysis of near-infrared spectra
Publication date: Available online 2 February 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Yong-Huan Yun, Hong-Dong Li, Bai-Chuan Deng, Dong-Sheng CaoAbstractWith the advances in innovative instrumentation and various valuable applications, near-infrared (NIR) spectroscopy has become a mature analytical technique in various fields. Variable (wavelength) selection is a critical step in multivariate calibration of NIR spectra, which can improve the prediction performance, make the calibration reliable and provide simpler interpretation. During the last several decades, there have been a large number of variable ...
Source: TrAC Trends in Analytical Chemistry - February 2, 2019 Category: Chemistry Source Type: research

LAMP-on-a-Chip: Revising Microfluidic Platforms for Loop-Mediated DNA Amplification
Publication date: Available online 31 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Haoqing Zhang, Ying Xu, Zdenka Fohlerova, Honglong Chang, Ciprian Iliescu, Pavel NeuzilAbstractNucleic acid amplification for the detection of infectious diseases, food pathogens, or assessment of genetic disorders require a laboratory setting with specialized equipment and technical expertise. Isothermal deoxyribonucleic acid amplification methods, such as loop-mediated isothermal amplification (LAMP), exhibit characteristics ideal for point-of-care (POC) applications, since their instrumentation is less demanding in co...
Source: TrAC Trends in Analytical Chemistry - February 1, 2019 Category: Chemistry Source Type: research

State of the art and prospects of methods for determination of lipophilicity of chemical compounds
Publication date: Available online 28 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Dagmara Kempińska, Tomasz Chmiel, Agata Kot-Wasik, Anna Mróz, Zofia Mazerska, Jacek NamieśnikAbstractLipophilicity of the compounds is useful to (i) explain their distribution in biological systems, which is different in plant and in animal organisms, (ii) predict the possible pathways of pollutant transport in the environment, and (iii) support drug discovery process and select optimal composition in terms of bioactivity and bioavailability. The lipophilic properties can be determined by two main approaches, ex...
Source: TrAC Trends in Analytical Chemistry - January 29, 2019 Category: Chemistry Source Type: research

Sampling techniques and preparation methods for microplastic analyses in the aquatic environment – a review
Publication date: Available online 29 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Friederike Stock, Christian Kochleus, Beate Bänsch-Baltruschat, Nicole Brennholt, Georg ReifferscheidAbstractMicroplastics are emerging pollutants in aquatic and terrestrial environments. In the last years, several case studies and reviews have been published about microplastics in freshwater and marine environments. However, no standardized methods are available for sampling and sample preparation. Based on literature research, this review presents different techniques and methods for sampling as well as the prepar...
Source: TrAC Trends in Analytical Chemistry - January 29, 2019 Category: Chemistry Source Type: research

Nanoparticle-based sensors for food contaminants
Publication date: Available online 28 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Yue Li, Zhongxing Wang, Li Sun, Liqiang Liu, Chuanlai Xu, Hua KuangAbstractWith the frequent occurrence of food scandals, food safety has become a topical issue throughout society. Various contaminants present in food can cause foodborne illnesses, posing a serious threat to human health, so an efficient and reliable method for the assessment of food is urgently required. Recently, nanoparticle (NP)-based sensors have emerged as a potential alternative or complementary analytical tool to conventional detection methods, w...
Source: TrAC Trends in Analytical Chemistry - January 28, 2019 Category: Chemistry Source Type: research

Recent development in amperometric measurements of vesicular exocytosis
Publication date: Available online 28 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Xiaoqing Liu, Yexiang Tong, Ping-Ping FangAbstractVesicular exocytosis is a ubiquitous bio-process involved in plenty of normal and pathologic events in living cells and has received increasing research attention. After decades of progress, amperometry has been demonstrated to be one of the most powerful techniques to monitor the exocytotic release in real time because of its remarkable advantages such as facility to implement, high sensitivity and sub-millisecond temporal resolution. In this review, we provide an overvi...
Source: TrAC Trends in Analytical Chemistry - January 28, 2019 Category: Chemistry Source Type: research

Recent developments in carbon nanomaterial-enabled electrochemical sensors for nitrite detection
Publication date: Available online 26 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Xunjia Li, Jianfeng Ping, Yibin YingAbstractNitrite is widely found in the natural environment and human life, but the abuse and potential toxicity of nitrite poses a great threat to human health. Therefore, it is necessary to develop effective, robust, and reliable methods for nitrite detection. Carbon nanomaterials have shown their great potential in the development of high-performance electrochemical sensors in view of their numerous fascinating properties. Carbon nanomaterial-enabled electrochemical sensors have been...
Source: TrAC Trends in Analytical Chemistry - January 26, 2019 Category: Chemistry Source Type: research

A micro(nano)plastic boomerang tale: A never ending story?
Publication date: Available online 22 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): M. Oliveira, M. Almeida, I. MiguelAbstractPlastics are an integral but largely inconspicuous part of human daily routines. Associated with a high production and single use nature of several products, small plastic particles became ubiquitous. Due to processes like water currents and winds, plastics may occur far from their place of origin and affect biota at different environmental compartments. In the environment plastics can degrade into increasingly smaller particles, reaching a nanometer size which increases their po...
Source: TrAC Trends in Analytical Chemistry - January 23, 2019 Category: Chemistry Source Type: research

Three-phase hollow fiber liquid-phase microextraction and parallel artificial liquid membrane extraction
Publication date: Available online 19 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Astrid GjelstadAbstractThree-phase hollow fiber liquid-phase microextraction (HF-LPME) and parallel artificial liquid membrane extraction (PALME) are both microextraction methods based on supported liquid membranes (SLMs). In a three-phase SLM system, analytes of interest are extracted from an aqueous sample, through an organic solvent and further into an aqueous acceptor receiver solution. This system offers a simple, selective and cheap alternative to existing sample preparation techniques, and because of minor use of ...
Source: TrAC Trends in Analytical Chemistry - January 20, 2019 Category: Chemistry Source Type: research

Emerging Strategies to Develop Sensitive AuNP-based ICTS Nanosensors
Publication date: Available online 18 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Yaofeng Zhou, Lu Ding, Yuhao Wu, Xiaolin Huang, Weihua Lai, Yonghua XiongAbstractImmunochromatographic strip (ICTS) nanosensors are one of the most popular point-of-care (POC) diagnostic devices currently available for rapid target screening. However, the widely used ICTS sensors based on 20-40 nm gold nanoparticles (AuNPs) as labels are limited by their low detection sensitivity due to their relatively weak color intensity. Moreover, the ever-increasing demand for high sensitivity is restricting the application of conve...
Source: TrAC Trends in Analytical Chemistry - January 18, 2019 Category: Chemistry Source Type: research

Recent development and applications of poly (ionic liquid)s in microextraction techniques
Publication date: Available online 17 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Meng Mei, Xiaojia Huang, Lei ChenAbstractMicroextraction techniques have been developed rapidly in recent years due to their numerous advantages including simplicity, miniaturization, cost-effectiveness, easy automation, low consumption of sample and eco-friendliness. Poly (ionic liquid)s (PILs) belong to a subclass of polyelectrolytes which are characterized by a series of unique physicochemical features including high thermal, chemical and mechanical stability, excellent plasticity and spatial controllability. PILs hav...
Source: TrAC Trends in Analytical Chemistry - January 17, 2019 Category: Chemistry Source Type: research

(Micro) plastic fluxes and stocks in Lake Geneva basin
This study aims to clarify these links in the Lake Geneva basin by analysing each step of the local plastic life cycle.Two distinct approaches have been compared: (i) a top-down approach based on modelling socio-economic activities, plastic losses and releases into the lake, and, (ii) a bottom-up approach based on extrapolating plastic flows into the lake based on field measurements from 6 different pathways.The two approaches yield results with similar orders of magnitude and provided a first estimation of the plastic flow from land to Lake Geneva in the order of magnitude of 55 tons year−1.Preliminary mass balance ...
Source: TrAC Trends in Analytical Chemistry - January 17, 2019 Category: Chemistry Source Type: research

Recent applications of high resolution mass spectrometry for the characterization of plant natural products
Publication date: Available online 11 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Gerardo Alvarez-Rivera, Diego Ballesteros-Vivas, Fabian Parada-Alfonso, Elena Ibañez, Alejandro CifuentesAbstractRecently, the high analytical power provided by the new HRMS instruments (working in the MS or MS/MS mode, stand alone or hyphenated with separation techniques) is making more feasible the characterization of plant secondary metabolites. In this regard, HRMS-based techniques are becoming the technique of choice, since they are capable of answering many questions regarding analytical characterization of ...
Source: TrAC Trends in Analytical Chemistry - January 12, 2019 Category: Chemistry Source Type: research

Recent trends in determination of neurotoxins in aquatic environmental samples
Publication date: Available online 11 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Małgorzata Rutkowska, Justyna Płotka-Wasylka, Tomasz Majchrzak, Wojciech Wojnowski, Hanna Mazur-Marzec, Jacek NamieśnikAbstractAnatoxins, saxitoxins, ciguatoxins, beta-N-methylamino-L-alanine and its isomers are groups of neurotoxins which have a highly specific effect on the nervous system of animals, including humans, by interfering with the transmission of nerve impulses. In order to assess the human exposure to these neurotoxins, selective, interlaboratory-validated analytical methods are being developed to facili...
Source: TrAC Trends in Analytical Chemistry - January 12, 2019 Category: Chemistry Source Type: research

Solid Phase Microextraction-Mass Spectrometry: Metanoia
Publication date: Available online 9 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): German A. Gómez-Ríos, Mario F. MirabelliAbstractAlthough multiple investigations into the benefits of directly interfacing SPME devices to MS instrumentation for rapid analysis of complex matrices have been ongoing for over 2 decades, several external factors have contributed to keeping these developments in the shadows. Among them, one can highlight the prejudice against microextraction technologies and ambient mass spectrometry, the lack of commercially available products, and overpraising by the analytica...
Source: TrAC Trends in Analytical Chemistry - January 10, 2019 Category: Chemistry Source Type: research

A critical review of solid-phase microextraction applied in drugs of abuse determinations and potential applications for targeted doping testing
Publication date: Available online 9 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Krzysztof GoryńskiAbstractConventional extraction and microextraction techniques have been extensively implemented as sample preparation methods for bioanalysis. Both types of techniques are affected by their own advantages and drawbacks. Conventional extractions usually afford better extraction efficiency as they are exhaustive in nature. Conversely, equilibrium-based microextraction techniques aim at either minimizing or completely circumventing the use of solvents, also reducing the time and cost of analysis. Furtherm...
Source: TrAC Trends in Analytical Chemistry - January 10, 2019 Category: Chemistry Source Type: research

Mass spectrometry-based fecal metabolome analysis
Publication date: Available online 7 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Jing Xu, Qin-Feng Zhang, Jie Zheng, Bi-Feng Yuan, Yu-Qi FengAbstractThe past decade has witnessed remarkable progress in our understanding of the important roles that gut microbial metabolites play in modulating the human health. The dynamic interplay between the host and gut microbiota is critical for maintaining the host homeostasis. The gut microbial metabolites are increasingly being recognized as an important part of human physiology. The symbiosis between human and gut microbiota relies on the communications with me...
Source: TrAC Trends in Analytical Chemistry - January 7, 2019 Category: Chemistry Source Type: research

New insights into the application of MSPD in various fields of analytical chemistry
Publication date: Available online 5 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Dorota Wianowska, Marta GilAbstractThe aim of this paper was to present the diversity of analytical challenges in which the MSPD technique is useful and the variety of sorbents that are currently applied to meet these challenges with particular emphasis on new research areas in which the MSPD process started to be applied. In addition, the paper presents new tools to improve both the MSPD yields using the MSPD processes supported by centrifugation, ultrasound, microwave and magnetism and its selectivity combining MSPD wit...
Source: TrAC Trends in Analytical Chemistry - January 5, 2019 Category: Chemistry Source Type: research

Application of ionic liquids in separation and analysis of carbohydrates: State of the art and future trends
Publication date: February 2019Source: TrAC Trends in Analytical Chemistry, Volume 111Author(s): Xiaoyong Zhao, Pengfei Cai, Cuirong Sun, Yuanjiang PanAbstractCarbohydrates are important raw materials in the chemical industry and they also play significant roles in biological systems. Ionic liquids (ILs), the promising and designable green solvents, have been proposed as an alternative to traditional organic solvents. In light of their unique physicochemical properties, ILs have a good many applications for carbohydrates. This review provides a compilation on the main results achieved by application of ILs for carbohydrate...
Source: TrAC Trends in Analytical Chemistry - January 5, 2019 Category: Chemistry Source Type: research

Editorial Board
Publication date: January 2019Source: TrAC Trends in Analytical Chemistry, Volume 110Author(s): (Source: TrAC Trends in Analytical Chemistry)
Source: TrAC Trends in Analytical Chemistry - January 4, 2019 Category: Chemistry Source Type: research

Tracing metabolic fluxes using mass spectrometry: stable isotope-resolved metabolomics in health and disease
Publication date: Available online 4 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Cristina Balcells, Carles Foguet, Josep Tarragó-Celada, Pedro de Atauri, Silvia Marin, Marta CascanteAbstractTracing metabolic fluxes, defined as the reaction and transport rates in living cells, is essential to characterize metabolic phenotypes. One of the most informative methods to predict fluxes is stable isotope-resolved metabolomics (SIRM). In SIRM, a biological system is fed with substrates labeled with stable heavy isotopes. This isotopic label propagates along metabolic pathways and is incorporated into me...
Source: TrAC Trends in Analytical Chemistry - January 4, 2019 Category: Chemistry Source Type: research

Recent advances in microfluidic devices for bacteria and fungus research
Publication date: Available online 4 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Wenting Zhou, Jian Le, Yang Chen, Ying Cai, Zhanying Hong, Yifeng ChaiABSTRACTMicroorganisms are not only common pathogens in clinical practice, but also an important participant in the maintenance of ecological balance, which plays a vital role in food production, microbial industry, and biomedical research etc. The traditional methods for bacterial and fungi research are time-consuming, high-cost, accurate operation required and unable to realize single-cell analysis. Microfluidic technologies have been applied to micro...
Source: TrAC Trends in Analytical Chemistry - January 4, 2019 Category: Chemistry Source Type: research

Current analytical methodologies and gaps for per- and polyfluoroalkyl substances determination in the marine environment
Publication date: Available online 4 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Hongru Feng, Yuefei Ruan, Kai Zhang, Paul K.S. LamAbstractPer- and polyfluoroalkyl substances (PFASs) have attracted worldwide concern. As the phase-out and substitution of PFASs continue to progress, substantial research efforts are being invested into researching the distribution and potential adverse effects of these substances. Oceans are the main final global sinks for most PFASs, and the marine environment plays a key role in their global transport and environmental fate. Therefore, a comprehensive understanding of ...
Source: TrAC Trends in Analytical Chemistry - January 4, 2019 Category: Chemistry Source Type: research

A critical outlook on recent developments and applications of matrix compatible coatings for Solid Phase Microextraction
Publication date: Available online 2 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Nipunika H. Godage, Emanuela GionfriddoAbstractThe introduction of matrix compatible solid phase microextraction (SPME) coatings in recent years has enabled analysis of complex matrices by direct immersion, and thus has overcome some of the challenges and limitations related to headspace SPME. The advantages associated with direct immersion solid phase microextraction through the use of matrix compatible coatings has led to the advancement of research studies in food, environmental and biological matrices. This review pro...
Source: TrAC Trends in Analytical Chemistry - January 3, 2019 Category: Chemistry Source Type: research

Environmental Applications of Solid-Phase Microextraction
Publication date: Available online 2 January 2019Source: TrAC Trends in Analytical ChemistryAuthor(s): Maria Llompart, Maria Celeiro, Carmen García-Jares, Thierry DagnacAbstractSolid-phase microextraction is a well-established green solvent free extraction technique with a large number of applications in different fields such as food, forensic, biomedical, and the environment. The present review comprehensively describes the most recent applications mostly reported from 2013 of SPME for the extraction of environmental pollutants including persistent organic pollutants (POPs), pesticides, and emerging pollutants such...
Source: TrAC Trends in Analytical Chemistry - January 3, 2019 Category: Chemistry Source Type: research