Determination of Fe, Cu, and Pb in edible oils using choline chloride:ethylene glycol deep eutectic solvent-based dispersive liquid-liquid microextraction associated with microwave-induced plasma optical emission spectrometry
Talanta. 2024 Mar 26;274:125939. doi: 10.1016/j.talanta.2024.125939. Online ahead of print.ABSTRACTA new simple, fast and environmentally friendly deep eutectic solvent based dispersive liquid-liquid microextraction (DES-based DLLME) methodology assisted by vortex is presented for the separation and preconcentration of three elements (i.e., Fe, Cu and Pb) from edible oil samples (i.e., soybean, sunflower, rapeseed, sesame, and olive oil) prior to the determination by microwave-induced plasma optical emission spectrometry (MIP-OES). The deep eutectic solvent selected as extractant (i.e., choline chloride and ethylene glycol...
Source: Talanta - March 28, 2024 Category: Chemistry Authors: Cristina Zapater Miguel Ángel Aguirre Nerea Gonz ález-Gallardo Diego J Ram ón Lorena Vidal Antonio Canals Source Type: research
A three-dimensional hierarchical porous graphene aerogel as a fiber coating for headspace solid-phase microextraction: Enhancing the enrichment and detection of polychlorinated naphthalenes in fish
In this study, a novel three-dimensional hierarchical porous deep eutectic solvents-modified graphene aerogel (3D DES-GA) was synthesized for use as a solid-phase microextraction (SPME) fiber coating. The SPME fiber was characterized by its fluffy and hierarchical porous structure, uniform thickness, and rapid mass transfer capabilities. This fiber demonstrated a lifetime (≥160 uses) and excellent precision (with relative standard deviations of 2.4-6.6% for single fiber and 6.0-9.8% for fiber-to-fiber repeatability). The SPME fiber also exhibited remarkable extraction performance for polycyclic aromatic hydrocarbons and ...
Source: Talanta - March 28, 2024 Category: Chemistry Authors: Pengfei Li Zhiqiang Wang Dandan Han Yehong Han Hongyuan Yan Source Type: research
Intelligent color image analysis of sintered ores for simple and rapid determination of Fe < sub > 3 < /sub > O < sub > 4 < /sub > concentration
Talanta. 2024 Mar 22;274:125985. doi: 10.1016/j.talanta.2024.125985. Online ahead of print.ABSTRACTA simple determination of the Fe3O4 concentrations of sintered ores using color images of the samples has been explored. Sintered ore is mainly composed of Fe2O3 (red), Fe3O4 (black), and other white inorganic oxides, so the color of sintered ore could be representative of the relative abundance of the constituents. Two important challenges were addressed to achieve reliable quantitative color image analysis. First, minute dents and bumps (embosses) exist on the sample surface due to inconsistent particle sizes and particle a...
Source: Talanta - March 28, 2024 Category: Chemistry Authors: Seongsoo Jeong Haeseong Jeong Seung Jee Yang Sanghoon Cho Hoeil Chung Source Type: research
Nanomaterials-based electrochemical biosensors for diagnosis of COVID-19
Talanta. 2024 Mar 26;274:125994. doi: 10.1016/j.talanta.2024.125994. Online ahead of print.ABSTRACTSince the outbreak of corona virus disease 2019 (COVID-19), this pandemic has caused severe death and infection worldwide. Owing to its strong infectivity, long incubation period, and nonspecific symptoms, the early diagnosis is essential to reduce risk of the severe illness. The electrochemical biosensor, as a fast and sensitive technique for quantitative analysis of body fluids, has been widely studied to diagnose different biomarkers caused at different infective stages of COVID-19 virus (SARS-CoV-2). Recently, many report...
Source: Talanta - March 28, 2024 Category: Chemistry Authors: Xinxin Liu Yifan Sun Huaiyu Song Wei Zhang Tao Liu Zhenyu Chu Xiaoping Gu Zhengliang Ma Wanqin Jin Source Type: research
A nanozyme with switchable enzyme-like activity for the logic gates detection of thymol and hydrogen peroxide in honey
Talanta. 2024 Mar 27;274:125951. doi: 10.1016/j.talanta.2024.125951. Online ahead of print.ABSTRACTA new nanozyme (CuGaa) with switchable enzyme-like activity of peroxidase and polyphenol oxidase was successfully prepared based on guanidinoacetic acid and copper. The two enzyme-like activities can be easily switched by changing temperature or adding MnCl2. At 4 °C, polyphenol oxidase-like activity decreased to nearly 1%, and the material is mainly characterized by peroxidase-like activity at this point. However, at 60 °C in the presence of 20 mM MnCl2, the peroxidase-like activity decreased to nearly 10%, and the polyphe...
Source: Talanta - March 28, 2024 Category: Chemistry Authors: Jie Li Luwei Wang Donghui Song Yongxin Li Hui Huang Source Type: research
Fabrication of a 96-electrode array using carbon dioxide laser ablation
Talanta. 2024 Mar 13;274:125912. doi: 10.1016/j.talanta.2024.125912. Online ahead of print.ABSTRACTThe 96 laser-induced multigraphene electrode (96L-MGE) integrated microwell plate (96 L-MGE-MP) is described. Each cell includes separate working, auxiliary, and reference electrodes, and the array sits on a poly-methyl methacrylate (PMMA) well. The 96 electrochemical cells were fabricated by laser ablation of polyimide adhesive tape, which created laser-induced graphene electrodes (L-GE). The microwell was produced using laser ablation of the PMMA sheet as well. The morphology and electrochemical characterization of L-GE wer...
Source: Talanta - March 28, 2024 Category: Chemistry Authors: Supatinee Kongkaew Yudtapum Thipwimonmas Mareeyam Hayeeabu Warakorn Limbut Source Type: research
Layered assembly of PEGylated graphene oxide and Mg-Al layered double hydroxide nanosheets with superior adsorption capacity and selective isolation of hemoglobin
This study developed a novel organic-inorganic hybrid composite, shortly as GO-PEG-LDHs, by self-assembly of exfoliated Mg-Al layer double hydroxide (LDHs) on the polyethylene glycol (PEG) grafted graphene oxide (GO) to achieve the selective adsorption of hemoglobin (Hb). The prepared GO-PEG-LDHs has a hierarchical structure with a homogeneous loading of exfoliated LDHs nano-sheets on its surface. The adsorption test reveals that GO-PEG-LDHs exhibits an adsorption efficiency of 95.03% for Hb and 3.45% for bovine serum albumin (BSA). The adsorption of Hb follows the Langmuir model, with an ultrahigh adsorption capacity of 5...
Source: Talanta - March 28, 2024 Category: Chemistry Authors: Shanshan Zhou Jialin Li Jun Zeng Yuewen Huang Bin Wang Source Type: research
Colorimetric biosensor based on aptamer recognition-induced multi-DNA release and peroxidase-mimicking three-way junction DNA-Ag/PtNCs for the detection of Salmonella typhimurium
Talanta. 2024 Mar 24;274:125930. doi: 10.1016/j.talanta.2024.125930. Online ahead of print.ABSTRACTSalmonella typhimurium, as a major foodborne pathogen, poses a serious threat to public health safety worldwide. Here, we present a colorimetric biosensor based on aptamer recognition-induced multi-DNA release and peroxidase-mimicking three-way junction DNA-silver/platinum bimetallic nanoclusters (3WJ/DNA-Ag/PtNCs) for the detection of S. typhimurium. In this method, S. typhimurium specifically binds to the aptamer and releases multiple cDNAs to form the three-way junction DNA structure and synthesize silver/platinum bimetall...
Source: Talanta - March 27, 2024 Category: Chemistry Authors: Lidong Pang Shihang Li Biqi Liu Qunchao Su Bo Qu Wei Zhang Xinyan Yang Yujun Jiang Source Type: research
One-pot, one-step, label-free miRNA detection method based on the structural transition of dumbbell probe
In this study, we present a one-pot, one-step, label-free miRNA detection method through a structural transition of a specially designed dumbbell-shape probe, initiating a rolling circle transition (RCT). In principle, target miRNA binds to right loop of the dumbbell probe (DP), which allows structural change of the DP to circular form, exposing a sequence complementary to the T7 promoter (T7p) previously hidden within the stem. This exposure allows T7 RNA polymerase to initiate RCT, producing a repetitive Mango aptamer sequence. TO1-biotin, fluorescent dye, binds to the aptamer, inducing a detectable enhancement of fluore...
Source: Talanta - March 27, 2024 Category: Chemistry Authors: Jae Hoon Jeung Hyogu Han Se Hee Jang Chang Yeol Lee Jun Ki Ahn Source Type: research
Rapid detection of SARS-CoV-2 spike protein using a magnetic-assisted electrochemical biosensor based on functionalized CoFe < sub > 2 < /sub > O < sub > 4 < /sub > magnetic nanomaterials
In this study, we proposed a magnetically-assisted method employing CFO@CS-Au MNP as the substrate material, which was functionalized with human angiotensin-converting enzyme (ACE2) for efficient capture of SARS-CoV-2 spike protein in solution. Subsequently, the captured protein was sensitively detected through differential pulse voltammetry (DPV) electrical analysis. The linear detection range of the labeled GCE/MNP/GA/ACE2/BSA electrochemical sensor is from 1 pg/mL to 10 μg/mL, with a minimum detection limit of 0.15 pg/mL. Furthermore, the fabricated GCE/MNP/GA/ACE2/BSA sensor achieved satisfactory recoveries of SARS-Co...
Source: Talanta - March 27, 2024 Category: Chemistry Authors: Bing Zhao Chan-Ru Xiong Yao Liu Qing-Cai Yu Xing Chen Source Type: research
A wearable microfluidic system for efficient sweat collection and real-time detection
Talanta. 2024 Mar 22;274:125967. doi: 10.1016/j.talanta.2024.125967. Online ahead of print.ABSTRACTSweat is an important biofluid with rich physiological information that can evaluate human health condition. Wearable sweat sensors have received widespread attention in recent years due to the benefits of non-invasive, continuous, and real-time monitoring. Currently, an efficient device integrating sweat collection and detection is still needed. Here, a wearable sweat microfluidic system was fabricated for real-time collection and analysis of sweat. The fabricated microfluidic system consisted of four layers, including a ski...
Source: Talanta - March 27, 2024 Category: Chemistry Authors: Yingda Yin Zhiguang Tan Wangwang Zhu Zhihua Pu Haixia Yu Ridong Wang Dachao Li Source Type: research
Advancing green extraction of bioactive compounds using deep eutectic solvent-based ultrasound-assisted matrix solid-phase dispersion: Application to UHPLC-PAD analysis of alkaloids and organic acids in Coptidis rhizoma
Talanta. 2024 Mar 22;274:125983. doi: 10.1016/j.talanta.2024.125983. Online ahead of print.ABSTRACTThe utilization of deep eutectic solvents (DES) in sustainable extracting and separating of phytochemicals shows promising prospect. An exceptionally fast, eco-friendly, and sustainable approach was proposed for extracting bioactive compounds from Coptidis Rhizoma based on deep eutectic solvent-based ultrasound-assisted matrix solid phase dispersion (DES-UA-MSPD). Single-factor experiments and Box-Behnken design were utilized to explore the optimal extraction conditions. The analysis indicated that the acidic DES, especially ...
Source: Talanta - March 27, 2024 Category: Chemistry Authors: Min Han Kunze Du Xicheng He Haixiang Li Jin Li Xiaoxia Li Yanxu Chang Source Type: research
A simple, rapid and sensitive sandwich immunoassay based on poly(N-isopropylacrylamide) for the detection of alpha-fetoprotein
Talanta. 2024 Mar 26;274:125932. doi: 10.1016/j.talanta.2024.125932. Online ahead of print.ABSTRACTAlpha-fetoprotein (AFP), as a tumor marker, plays a vital role in the diagnosis of liver cancer. In this work, a novel sandwich immunoassay based on a thermosensitive polymer, poly(N-isopropylacrylamide) (PNIPAM), was developed for the detection of AFP. This immunoassay could realize one-step rapid reaction within 1 h, and facilitate the separation of the target molecules by incorporating PNIPAM. In this method, a conjugate of PNIPAM and capture antibody (Ab1) was successfully synthesized as a capture probe and the synthetic ...
Source: Talanta - March 27, 2024 Category: Chemistry Authors: Yaran Zhang Kebing Yi Feng Gong Ziwen Tang Yu Feng Yilong Tian Ming Xiang Fuxiang Zhou Min Liu Xinghu Ji Zhike He Source Type: research
Click preparation of triazole-bridged teicoplanin-bound chiral stationary phases for efficient separating amino acid enantiomers
Talanta. 2024 Mar 24;274:125984. doi: 10.1016/j.talanta.2024.125984. Online ahead of print.ABSTRACTEnantioseparation of amino acids is considered as a challenging task due to the extreme structural similarity of their enantiomers. Herein, teicoplanin was modified with different chemical equivalents of azide groups and attached to silica particles by employing Click Chemistry for resolution of chiral amino acids for the first time. Interestingly, teicoplanin modified with 5-fold the chemical equivalent of azide groups (TK-2 CSP) exhibited superior amino acid separation ability compared to two other columns: one modified wit...
Source: Talanta - March 27, 2024 Category: Chemistry Authors: Chenglin Zhang Yuhan Wang Yuan Li Jiatai Song Yong Wang Source Type: research
Direct investigations of the effects of nicardipine on calcium channels of astrocytes by Atomic Force Microscopy
Talanta. 2024 Mar 22;274:125947. doi: 10.1016/j.talanta.2024.125947. Online ahead of print.ABSTRACTCalcium channel blockers (CCB) of astrocytes can blockade the calcium ions entry through the voltage gated calcium channels (VGCC), and is widely used in the diseases related with VGCC of astrocytes. But many aspects of the interaction mechanisms between the CCB and VGCC of astrocytes still remain unclear due to the limited resolution of the approaches. Herein the effects of the nicardipine (a type of CCB) on VGCC of astrocytes were investigated at very high spatial, force and electrical resolution by multiple modes of Atomic...
Source: Talanta - March 27, 2024 Category: Chemistry Authors: Xinyu Li Rongrong Feng Zeling Guo Yu Meng Yulan Zou Wenchao Liao Qianwei Peng Haijian Zhong Weidong Zhao Source Type: research
