Analytical Chemistry News

An easier analysis of complex mixtures with highly resolved and sensitivity enhanced 2D quantitative NMR: application to tracking sugar phosphates in plants

RSC - Anal. Methods latest articles - Wed, 04/05/2017 - 10:16

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY00316A, PaperSoumaya Khlifi, Caroline Mauve, Nathalie Glab, Francoise Gilard, Michael Hodges, Gregory Mouille, Jonathan Farjon
The combination of standard techniques with high resolution and sensitivity enhanced advanced techniques allowed for characterizing and quantifying sugar phosphates in plants biomarkers of photorespiration and photosynthesis in plants.
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Development and validation of a green chromatography for the determination of anthocyanins in haskap berry, mulberry and blackberry

RSC - Anal. Methods latest articles - Wed, 04/05/2017 - 09:15
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00229G, PaperJun Sang, Qun Ma, Cui-qin Li
This study aimed to develop and validate a green HPLC-DAD method to determine anthocyanins using ethanol and alpha-hydroxy acid aqueous solution as mobile phase. The effects of alpha-hydroxy acids on...
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One-step rapid synthesis of single thymine-templated fluorescent copper nanoclusters for "turn on" detection of Mn2+

RSC - Anal. Methods latest articles - Wed, 04/05/2017 - 08:15
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00625J, PaperBingyan Han, Rongchao Xiang, Xufen Hou, Mingbo Yu, Tingting Peng, Ying Li, Gaohong He
Rich-thymine (T) single- or double-strand DNAs have been identified as efficient templates favoring the formation of fluorescent copper nanoparticles (Cu NPs). In this work, we confirmed single base T could...
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Determination of anionic surfactants in real samples using a low-cost and high sensitive solid contact surfactant sensor with MWCNTs as the ion-to-electron transducer

RSC - Anal. Methods latest articles - Tue, 04/04/2017 - 07:07

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY00099E, PaperNikola Sakac, Maja Karnas, Marija Jozanovic, Martina Medvidovic-Kosanovic, Sanja Martinez, Jelena Macan, Milan Sak-Bosnar
Long-life, low-cost and fast-response graphite pencil lead surfactant sensors based on MWCNTs.
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A simple microfluidic method for one-step encapsulation of reagents with varying concentrations in double emulsion drops for nanoliter-scale reactions and analyses

RSC - Anal. Methods latest articles - Tue, 04/04/2017 - 06:07
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00544J, PaperLikai Hou, Yukun Ren, Yankai Jia, Xiaokang Deng, Zheng Tang, Ye Tao, Hongyuan Jiang
This work reports a simple microfluidic method for one-step encapsulation of two reagents with varying concentrations in water-in-oil-in-water (W/O/W) double-emulsion drops. This method not only enables nanoliter-scale reactions and analyses...
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An "on-off-on" fluorescence assay based on silicon nanoparticles for selective detection of manganese (II)

RSC - Anal. Methods latest articles - Mon, 04/03/2017 - 12:55
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00514H, PaperLei Meng, Yaqing Yuan, Guang Pu, Na Xu
Highly blue luminescent and water-soluble silicon nanoparticles (Si NPs) are prepared by an efficient one-pot hydrothermal route from (3-aminopropyl) trimethoxysilane and ascorbic acid at 160 oC. The label-free Si NPs...
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Molecularly imprinted core-shell hybrid microspheres for the selective extraction of vanillin

RSC - Anal. Methods latest articles - Mon, 04/03/2017 - 12:55
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00461C, PaperRafael Fernandes, Mehmet Dinc, Ivo Raimundo Jr. , Boris Mizaikoff
Molecularly imprinted polymers (MIPs) with a core-shell structure for efficient, reliable, and selective extraction of vanillin via solid-phase extraction (SPE) and incubation methods were developed using a sol-gel process based...
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Factorial design effects of plant density, pattern and light availability on the caffeine, chlorogenic acids, lipids, reducing sugars and ash contents of Coffea arabica L. beans and leaves

RSC - Anal. Methods latest articles - Fri, 03/31/2017 - 07:09
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00721C, PaperFernanda Delaroza, Miroslava Rakocevic, Galileu Bernardes Malta, Patricia Morena Sanchez, Roy E Bruns, Ieda Spacino Scarminio
Factorial design experiments were executed to determine the effects of plant pattern and density as well as the degree of light availability on the caffeine, chlorogenic acids, lipids, reducing sugars...
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An ultrasensitive "turn-off" SERS sensor for quantitatively detecting heparin based on 4-mercaptobenzoic acid functionalized gold nanoparticles

RSC - Anal. Methods latest articles - Thu, 03/30/2017 - 08:02
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00494J, PaperChen-Meng Zhang, Xiu Liang, Ting-Ting You, Nan Yang, Yu-Kun Gao, Peng-gang Yin
An ultrasensitive "turn off" Surface Enhanced Raman Spectroscopy (SERS) sensor was developed for detection of heparin based on the anti-aggregation of 4-mercaptobenzoic stabilized gold nanoparticles. In this paper, protamine, a...
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Rapid simultaneous extraction and magnetic particles-based enzyme inmunoassay parallel determination of ochratoxin A, fumonisin B1 and deoxynivalenol mycotoxins in cereal samples

RSC - Anal. Methods latest articles - Thu, 03/30/2017 - 06:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00386B, PaperJuan C. Vidal, Juan R. Bertolin, Alba Ezquerra, Susana Hernandez, Juan R Castillo
This work describes the development of a rapid method for the extraction and the immunochemical determination of the three mycotoxins deoxinivalenol, fumonisin B1, and ochratoxin A, which are frequently found...
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A pyrene-based fast responsive fluorescent probe for G-quadruplexes

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 13:38
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00556C, CommunicationXiao-Qi Yu, Chuang Jiang, Ling-Ling Li
A novel and efficient pyrene-based fluorescent probe (PBT) was found to be fast responsive and selective towards G-quadruplexes (G4). PBT exhibited opposite fluorescent variation tendency when binding to G4 and...
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A novel chemiluminescent immunochromatographic assay strip for rapid detection of mercury ion

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 11:37
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00231A, PaperXiaomei Wang, F. Liu, Qian Shao, Zhengrong Yin, Limin Wang, Zhifeng Fu
Mercuric ion (Hg2+) has been long regarded as one of the most hazardous environmental pollutants with serious toxic effect on environmental safety and human health. In the present work, an...
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Electrochemiluminescent detection of glyphosate using electrodes modified with self-assembled monolayer

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 09:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00506G, PaperGabriela Marzari, Maria V. Cappellari, Gustavo Marcelo Morales, Fernando Fungo
The use of glyphosate (GlyP) in agriculture causes environmental and health concerns to the modern society. Even today, its quantification remains as an analytical challenge. Therefore, it is required the...
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Iron-core/carbon-shell nanoparticles with intrinsic peroxidase activity: new platform for mimetic glucose detection

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 09:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00598A, PaperNatalya Surgutskaya, Marina E Trusova, Galina B. Slepchenko, Artem S. Minin, Alexandra Gennadevna Pershina, Anatoly Yermakov, Mikhail Uimin, Pavel S Postnikov
Artificial enzymatic mimics based on nanoparticles have become a powerful tool for improvement of analytical performance in detection of important bioactive compounds. For the first time the intrinsic peroxidase-like activity...
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Identification of Mango Maturity Level by the Analysis of Volatiles Based on Long Optical-Path FTIR Spectroscopy and Molecular Sieve

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 09:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00149E, PaperLeizi Jiao, Daming Dong, Pengcheng Han, Xiande Zhao, Xiaofan Du
Quality and shelf life of mangoes are closely related to the maturity level. The volatiles of mango vary with the maturity level. On the basis of our previous results in...
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Quantification of Amine Value in Aliphatic Amine Epoxy Hardeners by a Reaction-based Headspace Gas Chromatographic Technique

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 09:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00516D, PaperWei-Qi Xie, Yi-Xian Gong, Kong-Xian Yu
This paper reports an automated method for quantifying amine value in aliphatic amine epoxy hardeners by a reaction-based headspace gas chromatography. After aliphatic amine epoxy hardeners reacted with hydrochloric acid...
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A portable urine analyzer based on colorimetric detection

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 09:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00780A, PaperJiancheng Ye, Nan Li, Ying Lu, Jing Cheng, Youchun Xu
Urine examination is a basic program in routine check up that can reveal multiple parameters about our health and thus has significant meaning. However, the instruments for urine analysis in...
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Preparation of iron porphyrin-based polymer monolithic column via atom transfer radical polymerization for separation of proteins and small molecules

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 09:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00472A, PaperZhen Wei, Doudou Zhang, Cheng Li, Ligai Bai, Haiyan Liu, Hongyuan Yan
A novel iron porphyrin-based polymer monolithic column (50 [times] 4.6 mm i.d.) was prepared via atom transfer radical polymerization for separation of proteins from complex bio-matrix, taking advantages of specific...
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A sensitive and selective electrochemiluminescent sensor for Dopamine based on the inhibition of Dual-Stabilizers-Capped CdS Quantum Dots electrochemiluminescence

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 08:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00295E, PaperXuemei Yang, Mingli Wang, Minli Yang, Rui Jiang
An electrochemiluminescence (ECL) sensor with dual-stabilizers-capped CdS quantum dots (QDs) as ECL emitter was constructed and used for determination of Dopamine(DA). The dual-stabilizers-capped CdS QDs were covalently immobilized onto p-aminobenzoic...
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New Insights into Supercritical Fluid Chromatography for Chiral Separations

RSC - Anal. Methods latest articles - Tue, 03/28/2017 - 08:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00452D, Technical NoteHermes Licea Perez, Christopher A Evans
Bioanalysis of stereoisomers represents a great challenge, as chromatographic separation is not feasible using conventional reversed or normal phase chromatography. Supercritical fluid chromatography in combination with chiral stationary phases has...
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