Analytical Chemistry News

One-pot synthesis of a fluorescent molecularly imprinted nanosensor for highly selective detection of sulfapyridine in water

RSC - Anal. Methods latest articles - Thu, 01/18/2018 - 03:26
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02872E, Paperyufeng hu, Xiangdao Li, Jie Liu, Minghuo Wu, Ming Li, Xinke Zang
Fluorescent molecularly imprinted polymers (FMIPs) were prepared in a one-pot synthesis using Mn-doped ZnS quantum dots (QDs) as a fluorescent core, sulfapyridine (SPD) as a template, methacrylic acid as a...
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Preparation of ordered mesoporous carbon material based on poly-dopamine and its application in selective enrichment of N-linked glycans

RSC - Anal. Methods latest articles - Wed, 01/17/2018 - 09:04
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02800H, PaperYameng Zhao, Yangyang Gan, Lingyi Zhang, Zhanying Chu, Fan Liu, Weibing Zhang
Protein glycosylation has been demonstrated to be associated with many diseases. Taking into consideration of low abundance of N-linked glycans, the pretreatment of biological sample is a key problem. In...
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Modeling the response of a control-released ion-selective electrode and employing it for the study of permanganate oxidation kinetics

RSC - Anal. Methods latest articles - Wed, 01/17/2018 - 06:36

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02735D, PaperDean Song, Rongning Liang, Xiaohua Jiang, Huiqing Sun, Fanyu Kong, Bo Lv, Qiannan Fang, Wei Qin
For the first time, theoretical modeling of the response behavior of the potentiometric sensors based on the controlled release of the reagents is reported.
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Development of analytical method on pesticide residues in berries with dispersive solid phase extraction using multiwalled carbon nanotubes and primary secondary amine sorbents

RSC - Anal. Methods latest articles - Wed, 01/17/2018 - 03:27
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02178J, PaperPengyue Zhao, Pedro Alvarez, Xuesheng Li, Canping Pan
A dispersive solid phase extraction with primary secondary amine and multi-walled carbon nanotubes as mixture sorbent material was developed in multiple pesticide residue analysis for berry samples. Gas chromatography -...
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Rapid sample preparation with multi-channel focused infrared micro-ashing prior to determination of chromium in gelatin capsules by electrothermal atomic absorption spectrometry

RSC - Anal. Methods latest articles - Wed, 01/17/2018 - 03:27
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02844J, Technical NoteNi Zhang, Jianbin Zheng
A novel multi-channel micro-ashing method for gelatin capsules based on focused infrared radiation prior to trace chromium determination by electrothermal atomic absorption spectrometry (ETAAS) was proposed. Currently, almost all the...
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A quantitative LC-MS/MS method for simultaneous determination of deuvortioxetine, vortioxetine and their carboxylic acid metabolite in rat plasma, and its application to toxicokinetic study

RSC - Anal. Methods latest articles - Wed, 01/17/2018 - 03:27
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02642K, PaperMei Qin, Hongqun Qiao, Yanjuan Yuan, Qing Shao
A rapid, simple, efficient and stable method based on LC-MS/MS for simultaneous determination of deuvortioxetine, vortioxetine and their carboxylic acid metabolite in rat plasma has been established and validated. Carbamazepine...
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Ion mobility-derived collision cross section as an additional measure to support the rapid analysis of abused drugs and toxic compounds using electrospray ion mobility time-of-flight mass spectrometry

RSC - Anal. Methods latest articles - Tue, 01/16/2018 - 07:54
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02808C, PaperRu Lian, Fang Zhang, Yurong Zhang, Zhongping Wu, Haiying Ye, Chunfang Ni, Xiaobao Lv, Yinlong Guo
Despite recent advances in analytical techniques, high-throughput and rapid screening of abused drugs and toxic compounds is imperative. In this study, a method hyphenating ion mobility spectrometry with high-resolution time-of-flight...
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Detection of procalcitonin (PCT) using the double antibody sandwich method based on fluorescence resonant energy transfer between upconversion nanoparticles and quantum dots

RSC - Anal. Methods latest articles - Mon, 01/15/2018 - 09:19
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C8AY00039E, PaperYang Zhou, Xiangming Shao, Yuwang Han, Hongman Zhang
A nanosensor is designed using a double antibody sandwich method based on fluorescence resonance energy transfer (FRET) between NaYF4 (Yb, Er) upconversion nanoparticles (UCNPs) and CdTe quantum dots (QDs) for...
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Direct analysis of alkaloids in natural Cinchona bark and commercial extracts using time-of-flight secondary ion mass spectrometry

RSC - Anal. Methods latest articles - Mon, 01/15/2018 - 05:18

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02822A, PaperDerick[space]N. Ateacha, Ulrike Koch, Carsten Engelhard
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is used for the first time to characterize Cinchona alkaloids in natural Cinchona bark and commercial Cinchona extracts.
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Recyclable trypsin immobilized magnetic nanoparticles based on hydrophilic polyethylenimine modification and their proteolytic characteristics

RSC - Anal. Methods latest articles - Mon, 01/15/2018 - 04:17

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02418E, PaperLingyi Zhang, Bingbing Wang, Shulei Wang, Weibing Zhang
In this work, recyclable trypsin immobilized magnetic nanoparticles based on hydrophilic branched polyethylenimine (PEI) modification were synthesized under mild conditions.
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G-quadruplex DNAzyme-based LAMP biosensing platform for a novel colorimetric detection of Listeria monocytogenes

RSC - Anal. Methods latest articles - Mon, 01/15/2018 - 03:16
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02908J, Paperzhanmin liu, Chenhui Yao, Yanming Wang, Cuiyun Yang
Listeria monocytogenes is one of the most commonly pathogenic bacteria. After infection, the main symptoms of listeriosis are sepsis, meningitis and mononucleosis. For this purpose, a G-quadruplex DNAzyme-based LAMP biosensing...
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Analysis of Coffee Seed Vigor by Extractive Electrospray Ionization Mass Spectrometry

RSC - Anal. Methods latest articles - Mon, 01/15/2018 - 03:16
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02403G, PaperYalian Zhou, Meng Cui, Qin Yin, Min Deng, Yingbin Hao, Xueyong Huang, Liping Luo
Water extracts of coffee seeds of various ages were analyzed in positive ion mode by extractive electrospray ionization mass spectrometry (EESI-MS) without any sample pretreatment, and the typical metabolites were...
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A sensitive gold nanoparticle-based aptasensor for colorimetric detection of A[small beta]1-40 oligomers

RSC - Anal. Methods latest articles - Mon, 01/15/2018 - 03:16
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02918G, PaperXu Zhu, Ningning Zhang, Yintang Zhang, Baoxia Liu, Zhu Chang, Yanli Zhou, Yuanqiang Hao, Baoxian Ye, Maotian Xu
In this work, a gold nanoparticle-based label-free homogeneous phase colorimetric bioassay was developed for the detection of A[small beta]1-40 oligomers, an important biomarkers for the diagnosis and monitoring progression of Alzheimer's...
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A high-throughput method for orthophosphate determination of a thermostable membrane-bound pyrophosphatase activity

RSC - Anal. Methods latest articles - Mon, 01/15/2018 - 03:16
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02558K, PaperKeni Vidilaseris, Juho Kellosalo, Adrian Goldman
Membrane-bound pyrophosphatases (mPPases) are homodimeric integral membrane proteins that hydrolyse pyrophosphate into orthophosphates coupled to the active transport of protons or sodium ions across membranes. They occur in bacteria, archaea,...
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Ratiometric detection of biothiols by the DNA-templated silver nanoclusters-Hg2+ system

RSC - Anal. Methods latest articles - Fri, 01/12/2018 - 07:03
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02564E, PaperZheng-Yu Yan, Chunqing Tian, Xiaoyan Sun, Yi Wu, Dan Li, Baofen Ye
A novel fluorescent sensor for ratiometric detection of biothiols, such as cysteine (Cys) and glutathione (GSH), was developed. This sensor was based on the system composed of fluorescent silver nanoclusters...
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Effect of mobile phase composition on the analysis of aggregates of antibody drug conjugates (ADCs) using size exclusion chromatography

RSC - Anal. Methods latest articles - Fri, 01/12/2018 - 05:00

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02696J, CommunicationRabin Neupane, Malin Kallsten, Fredrik Lehmann, Jonas Bergquist
In this study, the effect of mobile phase composition for size exclusion chromatography (SEC) on antibody drug conjugate (ADC) aggregate analysis was investigated.
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A rapid, sensitive and green analytical method for the determination of sulfite in vinegars using pararosaniline reaction with image detection

RSC - Anal. Methods latest articles - Thu, 01/11/2018 - 06:36

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02155K, PaperPedro L. Almeida, Thais H. Figueiredo do Bonfim, Francisco Antonio S. Cunha, Kassio M. G. Lima, Jailane S. Aquino, Luciano F. Almeida
A green, rapid and sensitive automated analytical method with imaging detection for the determination of sulfite in vinegars using the pararosaniline (PRA)-formaldehyde-sulfite reaction is demonstrated.
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A "turn-on" fluorescence sensor for ascorbic acid based on graphene quantum dots via fluorescence resonance energy transfer

RSC - Anal. Methods latest articles - Thu, 01/11/2018 - 03:35
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02828H, PaperYue Gao, Xiaolu Yan, Meng Li, Han Gao, Jing Sun, Shuyun Zhu, Shuang Han, Li-Na Jia, Xian-en Zhao, Hua Wang
A novel turn-on fluorescent sensor for the detection of ascorbic acid (AA) has been developed based on fluorescence resonance energy transfer (FRET) between graphene quantum dots (GQDs) and squaric acid...
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A novel multicommuted flow analysis strategy for the spectrophotometric determination of cadmium in water at [small micro]g L-1 levels without using a preconcentration step

RSC - Anal. Methods latest articles - Thu, 01/11/2018 - 02:34
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02644G, PaperTiciane da Silva Magalhaes da Silva Magalhaes, Boaventura F. Reis
An automated flow analysis approach for the photometric determination of cadmium in water with improved sensitivity is described. The setup comprises a flow system module with the ability to perform...
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Simultaneous determination of tianeptine and its active metabolite tianeptine MC5 in rat plasma and brain tissue using high performance liquid chromatography/electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS)

RSC - Anal. Methods latest articles - Wed, 01/10/2018 - 12:20

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02506H, PaperN.[space]M. El Zahar, N. Magdy, A. M. El-Kosasy, Wayne D. Beck, Patrick M. Callahan, Alvin V. Terry, Michael G. Bartlett
Validated LC-ESI-MS/MS method for tianeptine and its main metabolite in plasma and brain.
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