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.

Determination of Methylamines and Methylamine-N-oxides in Particulate Matter Using Solid Phase Extraction Coupled with Ion Chromatography
Publication date: April 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 4 Author(s): Qing-Yang LIU, Ting-Ting ZHANG Currently, the concentrations of methylamines in fine particulate matter (PM) are most often measured by aerosol time-of-flight mass spectrometry. A novel method for identification and determination of methylamines and methylamine-N-oxides in fine particles based on solid phase extraction (SPE) coupled with ion chromatography (IC) was developed. The experimental conditions including SPE conditions and chromatographic conditions were optimized. The quartz filter loaded with particulat...
Source: Chinese Journal of Analytical Chemistry - April 10, 2018 Category: Chemistry Source Type: research

Efficient Detection of Environmental Estrogens Bisphenol A and Estradiol By Sensing System Based on AuNP-AuNP-UCNP Triple Structure
Publication date: April 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 4 Author(s): Qiao-Feng LI, Shu-Yue REN, Yu WANG, Jia-Lei BAI, Yuan PENG, Bao-An NING, Quan-Jun LYU, Zhi-Xian GAO A sensing system based on AuNP-AuNP-UCNP triple structure for efficient detection of dual targets bisphenol A and estradiol was constructed. In the preparation of triple structure, the gold nanoparticles (AuNPs) and upconversion nanoparticles (NaYF4: Yb, Er, Gd, UCNPs) were synthesized and surface modified. Then, the two nanoparticles and their aptamers were connected to form two kinds of optical fluorescent p...
Source: Chinese Journal of Analytical Chemistry - April 10, 2018 Category: Chemistry Source Type: research

Development of Dipolar Proton Transfer Reaction Mass Spectrometer for Real-time Monitoring of Volatile Organic Compounds in Ambient Air
Publication date: April 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 4 Author(s): Qiang-Ling ZHANG, Xue ZOU, Qu LIANG, Ya-Ting ZHANG, Ming-Jian YI, Hong-Mei WANG, Chao-Qun HUANG, Cheng-Yin SHEN, Yan-Nan CHU Volatile organic compounds (VOCs) in ambient air can participate in photochemical reactions, which lead to the generation of secondary pollutants such as ozone and aerosol. So real-time and accurate monitoring of atmospheric VOCs plays an important role in the study of the causes of air pollution. On the basis of proton transfer reaction mass spectrometry (PTR-MS) research, a novel di...
Source: Chinese Journal of Analytical Chemistry - April 10, 2018 Category: Chemistry Source Type: research

Development and Characterization of A Linear Matrix-assisted Laser Desorption Ionization Mass Spectrometer
Publication date: April 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 4 Author(s): Jia-Jun YU, Ping LIU, Zhen ZENG, Ying CHEN, Wei GAO, Mei LI, Chen-Guang WANG, Zheng-Xu HUANG, Zhen ZHOU, Lei LI Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) is an important analytical technique for biological macromolecules, such as proteins, peptides and nucleic acid, especially in the field of microbial identification. On the basis of previous study, a linear MALDI-TOF MS was been designed and assembled for biological applications. The instrument comprised a...
Source: Chinese Journal of Analytical Chemistry - April 10, 2018 Category: Chemistry Source Type: research

Fast Determination of Residual Sulfonamides in Milk by In-Tube Solid-Phase Microextraction Coupled with Capillary Electrophoresis-Laser Induced Fluorescence
Publication date: March 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 3 Author(s): ZHAO Shuo, WANG Hao-Tian, LI Ke, ZHANG Jing, WANG Xia-Yan, GUO Guang-Sheng A fast, feasible, eco-friendly method for determination of sulfonamides using in-tube solid-phase microextraction (IT-SPME) coupled with capillary electrophoresis-laser induced fluorescence was developed. The graphene-embedded porous polymer monolithic column prepared via in-situ UV polymerization was proposed as the IT-SPME column. The method was applied to determine residual sulfonamides in a real milk sample, and an amount of 3.7 ng ...
Source: Chinese Journal of Analytical Chemistry - March 10, 2018 Category: Chemistry Source Type: research

Electron Transfer Capacities of Dissolved Organic Matter Derived from Swine Manure Based on Eletrochemical Method
In this study, the electron transfer capacities (ETCs) of compost DOM samples at eight different composting stages were determined by electrochemical method. 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and Diquat dibro-mide monohydrate (DQ) were used to measured electron donating capacity (EDC) and electron accepting capacity (EAC) at working voltage 0.61 V/–0.49 V, respectively. The evolution characteristics of the chemical structures and components were analyzed by combining the three-dimensional fluorescence spectra, Fourier transform infrared (FTIR) spectra and elemental analysis. The results show...
Source: Chinese Journal of Analytical Chemistry - March 10, 2018 Category: Chemistry Source Type: research

Study on Tissue Distribution of A Variety of Endogenous Metabolites By Air Flow Assisted Ionization-Ultra High Resolution Mass Spectrometry Imaging
Publication date: March 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 3 Author(s): WANG Zhong-Hua, HE Bing-Shu, SUN Cheng-Long, SONG Xiao-Wei, HE Jiu-Ming, ZHANG Rui-Ping, ABLIZ Zeper As a promising new molecular imaging technique, mass spectrometry imaging (MSI) has attracted more and more attention in the field of biomedicine. A method of air flow assisted ionization-ultra high resolution mass spectrometry-based mass spectrometric imaging (AFAI-MSI) was developed to profile endogenous metabolites in rat kidney tissue in this study. Rat kidneys were collected and cut into frozen tissue sec...
Source: Chinese Journal of Analytical Chemistry - March 10, 2018 Category: Chemistry Source Type: research

Rapid Characterization of Triacylglycerols in Edible Oils by Matrix-assisted Laser Desorption/Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
Publication date: March 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 3 Author(s): LI Wei-Feng, YANG Qiu-Xia, LIN Ze-Peng, WANG Li-Ping, GUO Peng-Ran Composition and types of triacylglycerols (TAGs) in edible oils are closely related to our health. It is of vital significance to develop fast and high-efficiency methods for determination of TAGs. In this manuscript, qualitative analysis of TAGs was demonstrated using matrix-assisted laser desorption/ionization Fourier transform ion cyclotron resonance mass spectrometry (MALDI-FTICR-MS). 2,5-Dihydroxybenzoic acid (DHB) was employed as matrix an...
Source: Chinese Journal of Analytical Chemistry - March 10, 2018 Category: Chemistry Source Type: research

Generation of Water-In-Oil-In-Water (W/O/W) Double Emulsions by Microfluidics
Publication date: March 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 3 Author(s): LIU Zhao-Miao, DU Yu, PANG Yan Novel compartment microparticles prepared with double emulsion droplets as templates provide a protected internal space for material encapsulation. The effect of three-phase flow rate on the micro-droplet generation of double emulsion mechanism is available for reference to produce precise size and highly monodisperse particles. The influence of three-phase flow rate on the formation mode and size of the emulsion droplets is investigated by combination of experiment and numerical si...
Source: Chinese Journal of Analytical Chemistry - March 10, 2018 Category: Chemistry Source Type: research

Progress in Molecular Chaperone Regulation of Heat Shock Protein 90 and Cancer
Publication date: March 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 3 Author(s): ZHAI Rui, GONG Xiao-Yun, XIONG Xing-Chuang, JIANG You, HUANG Ze-Jian, FANG Xiang Heat shock protein 90 (HSP90) is a member of genetically conserved heat shock protein family. As an important molecular chaperone in eukaryotic cells, HSP90 plays a key regulatory role in maintaining cellular protein homeostasis. HSP90 clients encompass a wide range of proteins, thus HSP90 is involved in diverse biological process. With the deeper study, it is found that HSP90 takes an important part in the development and metasta...
Source: Chinese Journal of Analytical Chemistry - March 10, 2018 Category: Chemistry Source Type: research

Application of Inductively Coupled Plasma-Atomic Emission Spectrometry/Mass Spectrometry to Phase Analysis of Gold in Gold Ores
Publication date: February 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 2 Author(s): Liang-Cheng ZHAO, Jing-Gong WANG, Xing LI, Shuo ZHANG, Zhao-Fa ZHANG, Ming-Yue HU, Feng LU, Yi-Dan WANG, Yan-Qiao HU, Xiu-Ping GUO, Qing-Xue LIU, Hua-Jie LIU Inductively coupled plasma-atomic emission spectrometry/mass spectrometry (ICP-AES/MS) is a potentially powerful tool in chemical phase analysis of gold in batch mode, especially applicable to the low-grade gold ores with gold content of far below detection limit of the other methods, but it has not been used in gold phase analysis of gold ores. ...
Source: Chinese Journal of Analytical Chemistry - February 10, 2018 Category: Chemistry Source Type: research

Effect of Porogen Solubility Parameter on Structure of Chromatographic Supports with Large Pores
Publication date: February 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 2 Author(s): Meng-Fei LAN, Ning AN, Ying ZHAO, Wei CAO, Heng LI, Lan ZHAO, Yong-Dong HUANG, Rong-Yue ZHANG The macroporous microspheres were prepared through suspension polymerization based on a copolymer of glycidyl methacrylate and ethylene glycol dimethacrylate. The effect of porogen on the microspheres structure was evaluated in terms of pore size and surface area. Porogen contained dichloromethane (δ = 9.7 (cal cm–3)1/2) and N-octanol (δ = 10.3 (cal cm–3)1/2) which were correspond to a good and poor solvent...
Source: Chinese Journal of Analytical Chemistry - February 10, 2018 Category: Chemistry Source Type: research

Investigation of Non-covalent Interactions of 18-Crown-6 with Amino Acids in Gas Phase by Mass Spectrometry
Publication date: February 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 2 Author(s): Ruo-Fei WU, Yan-Dong HUANG, Yan-Qiu CHU, Zhi-Pan LIU, Chuan-Fan DING The non-covalent interactions between 18-Crown-6 (18c6) and 20 common types of protonated amino acids were explored by electrospray ionization mass spectrometry. The mass spectra showed that 18c6 could react with amino acids to form a non-covalent complexe in a stoichiometric ratio of 1:1. The calibration curves and linear equations for the complexes of L-Phe, L-Tyr, L-Lys and L-Asp with 18c6 were established by mass spectrometric titration...
Source: Chinese Journal of Analytical Chemistry - February 10, 2018 Category: Chemistry Source Type: research

Electrochemical Luminescent DNA Sensor Based on Polymerase-assisted Signal Amplification
Publication date: February 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 2 Author(s): Meng ZHANG, Hong HAI, Fen-Yue ZHOU, Jing-Cai ZHONG, Jian-Ping LI A novel polymerase-based electrochemical luminescence (ECL) DNA sensor was constructed for messenger RNA (mRNA) detection by cyclic chain displacement polymerization, assisted by target mRNA cycle and quantum dots signal amplification. Firstly, the mercapto-modified capture-type probe DNA (CP) was immobilized on the surface of a magneto-controlled glassy carbon electrode via Au-S bond. After the addition of target mRNA, CP was opened and hybrid...
Source: Chinese Journal of Analytical Chemistry - February 10, 2018 Category: Chemistry Source Type: research

Research Progress on Nitrite Electrochemical Sensor
Publication date: February 2018 Source:Chinese Journal of Analytical Chemistry, Volume 46, Issue 2 Author(s): Yan MAO, Yu BAO, Dong-Xue HAN, Bing ZHAO Nitrite has been widely used in industrial and agricultural production and is commonly found in food, drinking water, biology and environment. However, nitrite is a toxic inorganic pollutant that is very harmful to the health of human and other organisms. A variety of strategies have been proposed for nitrite detection in recent years. Among which, electrochemical approaches have gained more and more attention owing to the characteristics of simplicity, speediness, hig...
Source: Chinese Journal of Analytical Chemistry - February 10, 2018 Category: Chemistry Source Type: research