Analytical Chemistry News

A detection and confirmation strategy for screening of veterinary drugs in honey by liquid chromatography coupled quadrupole time-of-flight mass spectrometry

RSC - Anal. Methods latest articles - Thu, 11/23/2017 - 03:19
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02440A, PaperZhibin Wang, Yan Li, Qiaoying Chang, Jian Kang, Guofang Pang
A strategy for the quantification and confirmation of 40 multi-class veterinary drugs in honey by QuEChERS (quick, easy, cheap, effective, rugged, and safe) combined with liquid chromatography coupled quadrupole time-of-flight...
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Carrier mediated solvent bar microextraction coupled with HPLC-DAD for quantitative analysis of hydrophilic antihypertensive peptide VLPVPR in human plasma

RSC - Anal. Methods latest articles - Wed, 11/22/2017 - 03:51
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01927K, PaperJinlin Wang, Panwei Weng, Jing Zhou, Xu Zhang, Shufen Cui
The aim of this work was to develop the method for the determination of Val-Leu-Pro-Val-Pro-Arg (VLPVPR) antihypertensive peptide in human plasma based on the carrier mediated three phase solvent bar...
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DETERMINATION OF METHYLMERCURY IN SEDIMENT AND CYANOBACTERIA SAMPLES: METHOD VALIDATION AND APPLICATION TO A METHYLATION INVESTIGATION

RSC - Anal. Methods latest articles - Tue, 11/21/2017 - 12:26
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02415K, PaperLouise Aparecida Mendes, Maione Wittig Franco, Francisco Barbosa, Paula Iannarelli Aires de Carvalho, Jorge Carvalho de Lena, Claudia Windmoller
The aim of this work was to validate two methods for methylmercury (CH3Hg+) determination in sediments and cyanobacteria and their application to Hg methylation study of planktonic organisms in water...
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Amino-thiacalix[4]arene modified screen-printed electrodes as a novel electrochemical interface for Hg(II) quantification at pico-molar level

RSC - Anal. Methods latest articles - Tue, 11/21/2017 - 12:26
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02468A, CommunicationPrashanth S S. Adarakatti, Craig E. Banks, pandurangappa pandu malingappa
A simple amino-thiacalix[4]arene modified graphitic carbon have been prepared by a microwave-irradiation process and employed for the quantification of Hg(II) ions immobilized upon screen-printed graphite macroelectrodes (SPEs) as a novel...
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Rapid and selective determination of melamine from eggs and milk based on magnetic surface molecularly imprinting technology

RSC - Anal. Methods latest articles - Tue, 11/21/2017 - 08:20
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02055D, PaperLi Wang, Fen Qiu, Jian Li, Jiarong Pan
In this research, a rapid and selective method based on magnetic surface molecularly imprinting technology was presented for the determination of melamine from egg and milk samples, couple with high...
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An electrochemiluminescence sensor based on CdSe@CdS functionalized MoS2 and Hemin/G-quadruplex-based DNAzyme biocatalytic precipitation for sensitive detection of Pb(II)

RSC - Anal. Methods latest articles - Tue, 11/21/2017 - 06:19
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02334K, PaperXiaoli Du, Tianfang Kang, Liping Lu, Shuiyuan Cheng
A novel electrochemiluminescence (ECL) biosensor based on CdSe@CdS quantum dots (QDs) functionalized MoS2 modified electrode was developed for sensitive detection of Pb(II) using HRP-mimicking DNAzyme biocatalytic precipitation (BCP) for ECL...
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Electrochemical impedance spectroscopy of blood. Part 3: A study of the correlation between blood conductivity and sedimentation to shorten the erythrocyte sedimentation rate test

RSC - Anal. Methods latest articles - Mon, 11/20/2017 - 02:40
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01696D, PaperAlexander Zhbanov, Sung Yang
The study of erythrocyte aggregation and erythrocyte sedimentation rate (ESR) is very important both for basic research and medical applications. The duration of the Westergren ESR test is one hour...
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TiO2/CdS nanorod array based photoelectrochemical sensing of Cu2+ in human serum samples

RSC - Anal. Methods latest articles - Mon, 11/20/2017 - 02:40
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02625K, PaperKejun Feng, Minghui Yang, Fang Xie, Guiqiang Diao, Mingming Ou, Huanfeng Huang
In this work, we report a sensitive and selective photoelectrochemical sensor for detection of Cu2+ in human serum samples based on TiO2/CdS nanorod array. To prepare the sensor, TiO2 nanorod...
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Ag@SiO2 Nanocubes Loaded Miniaturized Filter Paper as Hybrid Flexible Plasmonic SERS Substrate for Trace Melamine Detection

RSC - Anal. Methods latest articles - Mon, 11/20/2017 - 02:40
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02192E, PaperMenbere Leul Mekonnen, Wei-Nien Su, Ching-Hsiang Chen, Bing Joe Hwang
A robust flexible paper-plasmonic hybrid SERS substrate is reported by exploiting the intrinsic properties of filter paper and anisotropic Ag@SiO2 nanocubes. The fibrous structure of paper promotes the assemblage of...
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Lysozyme-stabilized bimetallic gold/silver nanoclusters as a turn on fluorescent probe for determination of ascorbic acid and acid phosphatase

RSC - Anal. Methods latest articles - Fri, 11/17/2017 - 09:10
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02372C, PaperShu Pang, Siyu Liu
The bimetallic gold/silver nanoclusters have been synthesized in aqueous solution with lysozyme as stabilizing and reducing agents. The prepared lysozyme-stabilized gold/silver nanoclusters (Lys-Au/Ag NCs) displayed highly near-infrared fluorescence and excellent...
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A squaraine-based sensor for colorimetric detection of CO2 gas in aqueous medium through an unexpected recognition mechanism: experiment and DFT calculation

RSC - Anal. Methods latest articles - Fri, 11/17/2017 - 03:03
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02218B, PaperJianqi Sun, Xiang-Juan Zheng, Xinjie Wu, Dong Li, Guomin Xia, Shuxian Yu, Qiming Yu, Hongming Wang
A cationic squaraine-based chemosensor SQM had been synthesized, and its sensing behaviors towards nucleophiles followed by CO2 gas were described in detail by UV-Vis, ESI-MS and 1H NMR spectral analysis....
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Colorimetric ELISA with an acid-base indicator for sensitive detection of ochratoxin A in corn samples

RSC - Anal. Methods latest articles - Thu, 11/16/2017 - 04:31

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY01959A, PaperKe Pei, Ying Xiong, Xiangmin Li, Hu Jiang, Yonghua Xiong
In this study, a direct competitive enzyme-linked immunosorbent assay (dcELISA) with an acid-base indicator was developed for the naked-eye detection of ochratoxin A (OTA).
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Enhanced peroxidase-like activity of Mo doped ceria nanoparticles for sensitive colorimetric detection of glucose

RSC - Anal. Methods latest articles - Thu, 11/16/2017 - 04:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02459B, PaperXue Jiao, Wanyi Liu, Di Wu, Wenhao Liu, Hongjie Song
The development of highly efficient nanomaterials-based mimetic enzymes is much needed to replace natural enzymes due to their low cost, high stability and efficiently catalytic ability. Herein, multiple Mo-doped CeO2...
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Development of fluorescence polarization immunoassays for parallel detection of pesticides carbaryl and triazophos in wheat grains

RSC - Anal. Methods latest articles - Thu, 11/16/2017 - 04:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02091K, PaperAnna Boroduleva, Jing Wu, Qingqing Yang, Hui Li, Qi Zhang, Peiwu Li, Sergei A. Eremin
Fluorescence polarization immunoassays (FPIA) were developed for the determination of pesticides triazophos and carbaryl in wheat grains using the portable FPIA device Sentry 200 (Ellie). FPIA of carbaryl was developed...
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Method to study particle flow bias at a channel bifurcation in a microfluidic device

RSC - Anal. Methods latest articles - Thu, 11/16/2017 - 02:30
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02224G, Technical NoteMelinda Ann Lake, Seth A. Berry, David Hoelzle
Cell and particle sorting mechanisms are integral components in many microfluidic devices for cell and chemical processing. The objective of a microfluidic particle sorter is to separate a target particle...
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Selective and low potential electrocatalytic oxidation and sensing of L-Cysteine using metal impurity containing carbon black modified electrode

RSC - Anal. Methods latest articles - Thu, 11/16/2017 - 02:30
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02251D, PaperSornambikai Sundaram, Mohammed Rafiq Abdul Kadir, Annamalai Senthil Kumar, Ponpandian Nagamony, Viswanathan Chinnuswamy
Thiol containing amino acids, especially L-cysteine (L-CySH) detection without any interference from other biochemical is a challenging research interest in electroanalytical chemistry. Amongst various electrodes, nanogold modified electrode has been...
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A novel dual targets simultaneous chemiluminescence signal amplification strategy for enhancing the sensitivity of multiple biomolecules detection

RSC - Anal. Methods latest articles - Wed, 11/15/2017 - 06:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02102J, PaperJian Li, Jingjin Zhao, Shuting Li, Liangliang Zhang, Chuanqing Lan, Yong Huang, Shulin Zhao
The disease markers detection plays an important role in clinical application. However, rapid, low-cost and simultaneous detection of multiple trace disease markers remain a challenge because of their low abundance....
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Self-supported electrochemical sensor for simultaneously sensitive detection of trace heavy metal ions based on PtAu alloy/carbon nanofibers

RSC - Anal. Methods latest articles - Wed, 11/15/2017 - 03:33
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02223A, PaperSongge Zhang, Han Zhu, Piming Ma, Fang Duan, Weifu Dong, MingLiang Du
The key issue in efficient electrochemical detection of trace heavy metal ions (HMI) is to design hierarchical nanostructure electrode with sensitivity and low detection limit. In this work, a bimetallic...
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Towards improved quantitative analysis using surface-enhanced Raman scattering incorporating internal isotope labelling

RSC - Anal. Methods latest articles - Wed, 11/15/2017 - 03:33
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02527K, PaperAbdu Subaihi, Yun Xu, Howbeer Muhamadali, Shaun Mutter, Ewan W. Blanch, David I. Ellis, Royston Goodacre
Raman spectroscopy has attracted considerable interest during the past two decades as a vibrational technique used for the molecular characterisation of different molecules. Whilst the Raman effect is known to...
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Biosensor Applications of Graphene-Nanocomposites Bound Oxidoreductive and Hydrolytic Enzymes

RSC - Anal. Methods latest articles - Tue, 11/14/2017 - 04:13
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02606D, Critical ReviewQayyum Husain
Graphene based nanocomposites have successfully been employed for high yield and stable immobilization of oxidoreductive and hydrolytic enzymes. Enzymes immobilized both via adsorption and covalent attachment on graphene nanocomposites were...
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