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.

Study on Co-flow Effect on Janus Droplet Generation Based on Step Emulsification
In this study, a multi-channel step emulsification device was developed to generate Janus droplets and to study the effects of both continuous phase co-flow and dispersed phase flow on the generation of Janus droplets. Janus droplets were successfully prepared by the device, and the generation stability was optimized by using glass capillaries instead of microcapillary film based on their different wall contact angles at the channel outlet. The results showed that when the continuous phase co-flow rate increased, the resulted Janus droplet diameter decreased, and the generation frequency increased. When the flow rate of di...
Source: Chinese Journal of Analytical Chemistry - January 11, 2020 Category: Chemistry Source Type: research

Electrochemical Performance Evaluation of CuO@Cu2O Nanowires Array on Cu Foam as Bifunctional Electrocatalyst for Efficient Water Splitting
Publication date: January 2020Source: Chinese Journal of Analytical Chemistry, Volume 48, Issue 1Author(s): Xing-Xing MA, Li CHEN, Zhe ZHANG, Ji-Lin TANGAbstractWater splitting is of crucial importance for exploiting renewable energy conversion and storage systems. Designing efficient bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is in desperate need for the development of overall water-splitting devices. Herein, dense CuxO nanowires were fabricated on three dimensional Cu foam (CF), which were consisted of mixed Cu2O phase and CuO phase as electrochemical ...
Source: Chinese Journal of Analytical Chemistry - January 11, 2020 Category: Chemistry Source Type: research

Progress in Membrane Fusion and Its Application in Drug Delivery
Publication date: December 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 12Author(s): Ying-Ying SU, Chun-Yan LI, Di LIAbstractMembrane fusion plays an important role in regulating life activities of organisms. Intracellular membrane fusion plays a role in promoting the function of intracellular substances throughout the life cycle of an organism. The fusion of viruses and cell membranes may mark the end of life of an organism. However, due to the complexity of living cells, the interpretation of the results of organism research is often ambiguous. At present, only a few protein structures on the cel...
Source: Chinese Journal of Analytical Chemistry - December 15, 2019 Category: Chemistry Source Type: research

Research and Application Progress of Paper-based Microfluidic Sample Preconcentration
Publication date: December 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 12Author(s): Si-Jia LIANG, Ji-Kai MAO, Chen GONG, Dong-Dong YU, Jian-Guang ZHOUAbstractSample pretreatment is an important part in detection and analysis of samples, especially for those with low initial concentration. Preconcentration technology can improve the accuracy of analytical method and expand its application range. However, conventional sample preconcentration technology is often cumbersome, costly, time-consuming, and relies on expensive equipment. Paper-based microfluidic sample preconcentration technique has many a...
Source: Chinese Journal of Analytical Chemistry - December 15, 2019 Category: Chemistry Source Type: research

Coupled Time-of-Flight Secondary Ion Mass Spectrometry-Electrochemical Analysis of Electrode-Electrolyte Interface at High Vacuum of 10−5 Pa
Publication date: December 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 12Author(s): Hai-Lun XIA, Xin HUA, Yi-Tao LONGAbstractElectrode-electrolyte interface, where the electrochemical reaction happened, played an important role in the electrochemical mechanism investigation. The traditional electrochemical techniques paid more attention on the electron transfer process on the electrode but provided limited information of the electrochemical evolution at molecular level. Realizing the in-situ monitoring of the intermediates at the electrode-electrolyte interface during the redox reaction was essent...
Source: Chinese Journal of Analytical Chemistry - December 15, 2019 Category: Chemistry Source Type: research

Chemical Analysis and Imaging of Fingerprints by Air-flow Assisted Desorption Electrospray Ionization Mass Spectrometry
In this study four kinds of fingerprints, including sweat, inkpad, sunscreen, and liquid foundation, were analyzed by air-flow assisted desorption electrospray ionization mass spectrometry imaging (AFADESI-MSI). AFADESI was employed with air flow of 45 L min−1, and 5 μL min−1 acetonitrile was used as spray solvent at spray voltage of 7000 V. Positive ion full scan mode (100−1000 Da) was chosen. The results showed that AFADESI-MSI method could not only obtain chemical information of various endogenous and exogenous substances in fingerprints, but also obtain high resolution images of fingerprints. In addition, overla...
Source: Chinese Journal of Analytical Chemistry - December 15, 2019 Category: Chemistry Source Type: research

A New Methodology for Washcoat Analysis of Honeycomb-shaped Monolithic Catalysts Using Scanning Electron Microscopy and Energy-Dispersive X-ray Analysis
Publication date: December 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 12Author(s): Long-Chun BIAN, Cheng-Xiong WANG, Yan-Xiong LIU, Qiu-E CAO, Yun-Kun ZHAOAbstractThe thickness of washcoat loading on high-performance monolithic catalysts is normally determined by vernier caliper procedure, which gives rough result of washcoat thickness but does not address such parameters as morphology and homogeneity, accurate thickness of the layer and chemical composition of the coated layers in honeycomb-shaped monolithic catalysts. In this work, we proposed a methodology of washcoat analysis including the th...
Source: Chinese Journal of Analytical Chemistry - December 15, 2019 Category: Chemistry Source Type: research

Application of Mass Spectrometry in Analysis of Non-Enzymatic Glycation Proteins in Diabetic Blood
Publication date: November 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 11Author(s): Wei-Feng LI, De-Wen YAN, Yu JIN, Hai-Yan LI, Min MA, Zheng-Zhi WUAbstractDiabetes mellitus (DM) is a metabolic disorder disease characterized by hyperglycemia. Long-term physiological hyperglycemia will aggravate the degree of non-enzymatic glycation (NEG) proteins. Because the abnormal changes of non-enzymatic process can cause a series of pathological variation, NEG proteins have attracted more and more attention. Mass spectrometry (MS) is an indispensable and powerful analytical tool for the qualitative and quan...
Source: Chinese Journal of Analytical Chemistry - November 19, 2019 Category: Chemistry Source Type: research

Progress in DNA Tetrahedral Nanomaterials and Their Functionalization Research
Publication date: November 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 11Author(s): Li-Xing YU, Rui ZHAI, Xiao-Yun GONG, Jie XIE, Ze-Jian HUANG, Mei-Ying LIU, You JIANG, Xin-Hua DAI, Xiang FANG, Xiao-Ping YUAbstractDNA tetrahedral nanomaterials have been widely used in the fields of biosensing, drug delivery, bioimaging and separation analysis because of their high stability, good biocompatibility and easy modification. Through different designs, specific functional molecules can be modified at DNA tetrahedral vertices, DNA tetrahedral cage structures, DNA double helix structures or DNA tetrahedro...
Source: Chinese Journal of Analytical Chemistry - November 19, 2019 Category: Chemistry Source Type: research

Multiplex Nested Solid Phase PCR-Array Chip for Simultaneous Detection of Highly Pathogenic Microorganisms
Publication date: November 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 11Author(s): Can-Can ZHU, Jun-Sheng CUI, An-Zhong HU, Ke YANG, Jun ZHAO, Yong LIU, Guo-Qing DENG, Ling ZHUAbstractInfectious diseases caused by highly pathogenic microorganisms are the main factors threatening human health and causing social panic. To simultaneously detect bacteria and viruses in a single test, a PCR-Array chip based on solid phase PCR (SP-PCR) was developed, in which an ultraviolet cross-linking method was used to fix oligonucleotide sequence on the grass to develop a PCR array chip for detection of Crimea-Con...
Source: Chinese Journal of Analytical Chemistry - November 19, 2019 Category: Chemistry Source Type: research

Preparation of Molecularly Imprinted Carbon Microspheres by One-Pot Hydrothermal Method and Their Adsorption Properties to Perfluorooctane Sulfonate
Publication date: November 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 11Author(s): Hui YU, Yan-Fei CHEN, Hui-Qin GUO, Wen-Tian MA, Jing LI, Shui-Gen ZHOU, Sen LIN, Liu-Shui YAN, Ke-Xin LIAbstractMolecularly imprinted carbon microspheres (MIC) were synthesized by one-pot hydrothermal method with perfluorooctane sulfonate (PFOS) as template, Camellia oleifera seed shell as carbon precursor and phloroglucinol as additive. The as-prepared PFOS-MIC was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), specific surface area and pore size distribution analyzer ...
Source: Chinese Journal of Analytical Chemistry - November 19, 2019 Category: Chemistry Source Type: research

A Novel Colorimetric Fluorescent Probe for Fe3+ Based on Tetraphenylethylene-rhodamine
Publication date: November 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 11Author(s): Jia-Min CHEN, Jing ZENG, Zhen ZHANG, Abudu-Rexit ABULIKEMUAbstractA novel tetraphenylethylene-rhodamine-based fluorescent probe amide compound L was synthesized and its sensing properties of metal ions were investigated. It exhibited high sensitivity and high selectivity toward Fe3+ compared with other common metal ions in EtOH-H2O (50 μM, 3:2, V/V, pH 7.0). A fluorescence quenching ratio of 92% at 482 nm and 254-fold enhancement of fluorescence intensity at 582 nm were achieved upon the addition of 4.0 equiv. Fe3...
Source: Chinese Journal of Analytical Chemistry - November 19, 2019 Category: Chemistry Source Type: research

Recent Advances in Fluorescence Imaging of Bioactive Molecules in Neurons and in Vivo
Publication date: October 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 10Author(s): Xin WANG, Ping LI, Wen ZHANG, Bo TANGAbstractBrain possesses a unique chemical composition and reactivity. Bioactive molecules in brains including metal ions, reactive oxygen species, neurotransmitters and neurotransmitter hydrolases play multifarious and pivotal roles in the function of brain. These molecules keep steady-state concentrations for maintaining the brain's structure and function. However, the abnormal changes in bioactive molecular levels are associated with various brain diseases such as Parkinson's d...
Source: Chinese Journal of Analytical Chemistry - October 10, 2019 Category: Chemistry Source Type: research

Implantable and Flexible Electronics for In vivo Brain Activity Recordings
Publication date: October 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 10Author(s): Jin-Fen WANG, Hui-Hui TIAN, Ying FANGAbstractImplantable electronics are essential for electrophysiological recording at single-neuron and sub-millisecond resolution in the fields of neuroscience and neuroprosthesis. Advances in nano/microfabrication techniques offer new and exciting opportunities for the development of high-density implantable electronics. However, the mechanical mismatch between microfabricated rigid electronics and soft brain tissues has been shown to cause inflammatory responses, leading to sign...
Source: Chinese Journal of Analytical Chemistry - October 10, 2019 Category: Chemistry Source Type: research

In Vivo Electrochemical Detection of Hydrogen Peroxide and Dopamine
Publication date: October 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 10Author(s): Shuai ZHANG, Tao-Tao FENG, Li ZHANG, Mei-Ning ZHANGAbstractSimultaneous analysis of hydrogen peroxide (H2O2) and dopamine (DA) in central nervous system is of great significance and has great challenges. Herein, we reported one ring-disk microelectrode for simultaneous electrochemical analysis of H2O2 and DA. To selectively detect H2O2, the carbon fiber disk (CFdisk) electrode in the middle of the ring-disk microelectrode was electrochemically modified by Prussian blue (PB) and poly(2,3-dihydrothieno-1,4-dioxin) (PE...
Source: Chinese Journal of Analytical Chemistry - October 10, 2019 Category: Chemistry Source Type: research