Chinese Journal of Analytical Chemistry This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

An Indirect Competitive Enzyme-linked Immunosorbent Assay for Simultaneous Determination of Florfenicol and Thiamphenicol in Animal Meat and Urine
Publication date: August 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 8Author(s): Ran LI, Ze-Jia LIN, Jin-Yi YANG, Zhen-Lin XU, Hong WANG, Hong-Tao LEI, Yuan-Ming SUN, Yu-Dong SHENAbstractA high-affinity polyclonal antibody was prepared by immunizing animals with haptens FFD and FFM. Under the optimal combination of coating antigen and antibody, an indirect competitive enzyme-linked immunosorbent assay (icELISA) for simultaneous detection of florfenicol and thiamphenicol residues in animal meat and urine samples was developed. The icELISA showed an IC50 value of 1.32 ng mL−1 for florfenicol and 2...
Source: Chinese Journal of Analytical Chemistry - July 27, 2018 Category: Chemistry Source Type: research

Rapid Determination of Dissolved Phosphorus in Environmental Waters Using Inductively Coupled Plasma Tandem Mass Spectrometry
In this study, a fast, accurate, and interference-free method for the determination of dissolved P in environmental waters based on inductively coupled plasma tandem mass spectrometry (ICP-MS/MS) was developed. This ICP-MS/MS was operated in the MS/MS mode to provide an interference-free measurement. The developed method exhibited excellent linearity (R2 = 0.9999) over a concentration range of 0.5–500 μg L−1, with a limit of detection of 8.1 ng L−1 in 5% nitric acid solutions. The recoveries (90%–105% in water samples) and the concentrations determined by this method were in good agreement with those determined us...
Source: Chinese Journal of Analytical Chemistry - July 27, 2018 Category: Chemistry Source Type: research

Development of a SIMION-Simulated Ion Funnel Tube for Proton Transfer Reaction Mass Spectrometry
In this study, an ion funnel capable of functioning as a drift tube in a PTR-MS system was designed and studied by computer simulation. To optimize the geometrical and electrical parameters of the ion funnel, five ion funnel configurations were constructed. The merits and features of the respective ion funnels were evaluated, and the ion transmission characteristics were investigated and analyzed. An optimized ion funnel model was compared against the typical traditional drift tube that was used in PTR-MS for ion transmission, and it was found that the ion traveling trajectories in the ion funnel and traditional drift tube...
Source: Chinese Journal of Analytical Chemistry - July 27, 2018 Category: Chemistry Source Type: research

Progresses of Single Molecular Fluorescence Resonance Energy Transfer in Studying Biomacromolecule Dynamic Process
Publication date: June 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 6Author(s): Le-Le SUN, Ying-Ying SU, Yan-Jing GAO, Wei Li, Hui LYU, Bin LI, Di LIAbstractBiomacromolecules participate in various kinds of vital processes. Observing and analyzing their structural dynamic and the dynamic processes of intermolecular interaction at molecular level are important for understanding the action mechanism. Since its advent, single molecular fluorescence resonance energy transfer (SM-FRET) has demonstrated its great potential in studying conformational change and interaction process of biomacromolecules, an...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Applications of Nanopore Sensing in Detection of Toxic Molecules
Publication date: June 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 6Author(s): Shuo ZHOU, Peng TANG, Yun-Jiao WANG, Liang WANG, De-Qiang WANGAbstractAs a novel analytical method, nanopore sensing is widely applied in many fields such as nucleic acids sequencing, protein/peptides analysis, detection of metal ions and biomacromolecules including virus, bacteria, etc. With the growing public concerns on dietary safety and public security, there has been a greater demand on the detection of toxic molecules. With high sensitivity and selectivity, nanopore sensing is considered as a more powerful assay,...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Real-time Event Recognition and Analysis System for Nanopore Study
Publication date: June 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 6Author(s): Hui-Feng WANG, Fei HUANG, Zhen GU, Zheng-Li HU, Yi-Lun YING, Bing-Yong YAN, Yi-Tao LONGAbstractTo achieve fast and accurate analysis of weak current signal of nanopore-based single molecule detection, an online data process based on adaptive threshold algorithm with data buffering technique and finite impulse response filtering was designed. A software system based on the data process was developed for online recognition and analysis of nanopore events during nanopore experiment. To testify the performance of the algori...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Research Methods for Structural Analysis of Lactic Acid Bacteria Induced Exopolysaccharides
In this report, we summarized the current progress of key methodologies involved in the structural analysis of LAB-generated EPSs, including their isolation, purification, primary structure and advances in structural research. A comprehensive discussion regarding the application of chemical analysis, instrument analysis and computer aided technology in the structure analysis of LAB-generated EPSs was provided. Further, the future development of the research on the structure of LAB-generated EPSs was also presented.Graphical abstractThe structural analysis of exopolysaccharides produced by lactobacillus is the basis for exp...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Development of a High Performance Liquid Chromatography-Tandem Mass Spectrometry Method for Determination of Lipophilic Toxins in Marine Shellfishes and Edible Safety Evaluation
In this study, several common lipophilic shellfish toxins (LSTs) in marine shellfishes were simultaneously detected by liquid chromatography-tandem mass spectrometry, and the safety risk of commercial marine shellfishes was evaluated based on the materiome of LSTs. Under the optimal conditions, the developed method displayed satisfactory recovery values (63.2%–88.8%), precision (relative standard deviations ≤ 14.5%), and sensitivity (limit of detection in the range of 0.54–2.69 ng g−1) for all analytes. Among the 105 commercially available shellfish samples, 42.86% of the samples had at least one kind of toxins. Th...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Protein Detection Through Single Molecule Nanopore
Publication date: June 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 6Author(s): Yi LIU, Xu-Feng YAO, Hai-Yan WANGAbstractA single nanopore represents a versatile single-molecule probe that can be employed to reveal several important features of proteins, such as physical structure, backbone flexibility, mechanical stability, their folding state, binding affinity to other interacting ligands and enzymatic activity. In this review, we summarize the development and current research related to the field of protein detection by nanopore, as well as a few examples of the pioneer work on protein detection...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Progress on Detection of Metals Ions by Functional Nucleic Acids Biosensor
Publication date: July 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 7Author(s): Zai-Hui DU, Xiang-Yang LI, Jing-Jing TIAN, Yang-Zi Zhang, Hong-Tao TIAN, Wen-Tao XUAbstractFunctional nucleic acids are natural or artificial nucleic acid sequences with specific functions and special structures. A part of metal ions are essential trace elements of human health, but excessive metal ions will be harmful to human health. The functional nucleic acids are widely used for detection of metal ions because of its advantages such as easy modification, low price, high stability and strong specificity. This paper ...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Correlated Secondary Ion Mass Spectrometry-Laser Scanning Confocal Microscopy Imaging for Single Cell-Principles and Applications
Publication date: July 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 7Author(s): Chang-Fang SHAO, Yao ZHAO, Kui WU, Fei-Fei JIA, Qun LUO, Zhe LIU, Fu-Yi WANGAbstractSecondary ion mass spectrometry (SIMS) as a powerful surface analysis technique has been widely applied in semiconductor industry and geology research. Recently, with the development of instrumental technology, SIMS is attracting more and more attention in life sciences. SIMS can provide surface MS spectra, 2D/3D chemical images and depth profiling of substances simultaneously. The minimal lateral resolution of 2D SIMS imaging is 80–10...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Enrichment and Identification of Metallothionein by Functionalized Nano-Magnetic Particles and Matrix Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry
Publication date: July 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 7Author(s): Xin-Yu HE, Bing WANG, Yang-Yang ZHOU, Xiao-Jun BIAN, Juan YANAbstractAs a low molecular weight protein with the ability of binding metal ions and high inducibility, metallothionein (MT) is often regarded as an important biomarker for assessment of heavy metal pollution in water environment. In the light of that the traditional process of enrichment and identification is time-consuming and complicated, we prepared a core-shell nanoparticle, gold-coated iron oxide nanoparticles (Fe3O4@Au NPs) herein. It possessed the adva...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Solid-phase Extraction for Analysis of Short-Chain Chlorinated Paraffins in Water Samples
Publication date: July 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 7Author(s): Ying-Jun WANG, Ya-Wei WANG, Gui-Bin JIANGAbstractA method for analysis of short-chain chlorinated paraffins (SCCPs) in water based on solid-phase extraction (SPE) was established using electron capture negative chemical ionization mass spectrometry (GC-ENCI-MS). The SPE parameters, including the sorbent, eluent and elution volume were optimized. The Agilent Bond Elut-C18 was precleaned with 3 mL of hexane and 3 mL of methanol, and subsequently conditioned with 3 mL H2O prior to use. After the water samples were enriched...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Quantitative Detection of PremicroRNA-21 Based on Chimeric Molecular Beacon
Publication date: July 2018Source: Chinese Journal of Analytical Chemistry, Volume 46, Issue 7Author(s): Hai-Long XIE, Tian-Tian WU, Zhen-Hua XIE, Jia-Long FAN, Chun-Yi TONGAbstractAs an important tumor marker, the expression level of premicroRNA-21 (pre-miR-21) can provide important information for early diagnosis, drug treatment and prognosis of tumor. Thus, developing pre-miR-21 detection is of great importance for diagnosis of disease. Herein, a direct, simple and rapid method for quantitative detection of pre-miR-21 was developed. This detecting system contained the tool of molecular beacon which could hybridize speci...
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Ethanol Gas Sensor Based on γ-Fe2O3 Nanoparticles Working at Room Temperature with High Sensitivity
This study indicated that the γ-Fe2O3 phase could be a type of promising room-temperature gas sensing material for ethanol gas detection.Graphical AbstractIn the present work, γ-Fe2O3 nanoparticles were obtained by an annealing treatment. The gas-sensing experiments showed that the γ-Fe2O3 nanoparticles displayed excellent high-performance sensing properties for the detection of ethanol gas at the optimum operating temperature (200 °C) and room temperature. This study indicates that γ-Fe2O3 nanoparticles could be a type of promising gas sensing material for ethanol gas detection. (Source: Chinese Journal of Analytical Chemistry)
Source: Chinese Journal of Analytical Chemistry - July 11, 2018 Category: Chemistry Source Type: research