Analytical Chemistry News

Highly sensitive and label-free determination of thiram residue using surface-enhanced Raman spectroscopy (SERS) coupled with paper-based microfluidics

RSC - Anal. Methods latest articles - Wed, 10/11/2017 - 00:32
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01637A, PaperJiaji Zhu, Quansheng Chen, Felix Kutsanedzie, Mingxiu Yang, Qin Ouyang, Hui Jiang
In this study, a paper-based microfluidic surface-enhanced Raman spectroscopy (SERS) device was employed for the determination of trace level thiram. The paper-based microfluidic device was fabricated by cutting hydrophilic region...
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Chemical state and isotope ratio analysis of individual uranium particles by a combination of micro-Raman spectroscopy and secondary ion mass spectrometry

RSC - Anal. Methods latest articles - Tue, 10/10/2017 - 20:28
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01815K, PaperTakumi Yomogida, Fumitaka Esaka, Masaaki Magara
An analytical procedure using micro-Raman spectroscopy (MRS) and secondary ion mass spectrometry (SIMS) was developed to elucidate both chemical states and isotope ratios of individual micron-sized uranium particles. Each uranium...
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High Performance Liquid Chromatography coupled to Electrospray Ionisation Mass Spectrometry method for the detection of salivary human neutrophil alpha defensins HNP1, HNP2, HNP3 and HNP4

RSC - Anal. Methods latest articles - Mon, 10/09/2017 - 21:15
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01676J, PaperNadia Ashrafi, C Lapthorn, Frank Pullen, F Naclerio, Birthe Vejby Vejby Nielsen
Human neutrophil alpha defensins are antimicrobial peptides involved in the first line of defence against invading pathogens. To develop a deeper understanding of the immune responses in relation to airway...
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A Highly Selective Schiff Base Fluorescent Chemosensor for Lu3+

RSC - Anal. Methods latest articles - Mon, 10/09/2017 - 20:12
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01808H, PaperLina Wang, Juanjuan Tang, Ning Sui, Xing Yang, Luyao Zhang, Xiaojun Yao, Qinfei Zhou, Hailian Xiao, ShaoPing Kuang, William Yu
A Schiff base derivative, N-(3-methoxy-4-hydroxybenzylidene)salicyloylhydrazone (L) shows high selectivity to Lu3+ not only in abiotic systems but also in living cells with fluorescence. The presence of PVP can increase the...
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Determination of agrochemical multi-residues in grapes. Identification and confirmation by gas chromatography-mass spectrometry

RSC - Anal. Methods latest articles - Mon, 10/09/2017 - 05:43

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY01448A, PaperViviane G. Lima, Vania P. Campos, Thiago C. Santana, Franciele O. Santana, Tadeu A. C. Costa
The valley of the Sao Francisco river, northeastern Brazil, is home to the major mango and grape producers of Brazil, many of which already export to foreign markets.
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Storage and controlled release of fragrances maintaining a constant ratio of volatile compounds

RSC - Anal. Methods latest articles - Sun, 10/08/2017 - 23:36
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01799E, PaperYuliya E. Silina, Jennifer R. Tillotson , Andreas Manz
Controlled fragrance release at the right time, in the right place, depending on the context remains a technological challenge in the areas of psychophysiology, biochemistry or entertainment industry. In this...
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Efficient, sensitive and fast microextraction method followed by gas chromatography-mass spectrometry for the determination of polycyclic aromatic hydrocarbons in bread samples

RSC - Anal. Methods latest articles - Sun, 10/08/2017 - 23:36
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02229H, PaperReza Rostampour, Mahdieh Kamalabadi, Marzieh Kamankesh, zahra Hadian, Sahar Jazaeri, Abdorreza Mohammadi, Javad Zolgharnein
In this research, 16 polycyclic aromatic hydrocarbons (PAHs) in bread samples were simultaneously determined using microwave-assisted extraction and dispersive liquid-liquid microextraction (MAE-DLLME) coupled with gas chromatography-mass spectrometry (GC-MS). Effective parameters...
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Monitoring of Drinking Water Quality: A Preliminary Approach by an Electronic Tongue based on Functionalized Polymer Membrane Electrodes

RSC - Anal. Methods latest articles - Sun, 10/08/2017 - 23:36
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01756A, PaperManmatha Mahato, Basudam Adhikari
Functionalized polymer membrane electrodes based multichannel sensor is used as an electronic tongue to monitor the drinking water (DW) quality simply by measuring the surface electric potential with respect to...
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Electrochemical nanostructure platform for analysis of glutathione in the presence of uric acid and tryptophan

RSC - Anal. Methods latest articles - Sun, 10/08/2017 - 23:36
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02057K, PaperHassan Karimi-Maleh, Asma Bananejad, Mohammad Reza Ganjali, Parviz Norouzi
In this work, NiO-CNT nanocomposite and 2-(3,4 dihydroxyphenethyl) isoindoline-1,3-dione (DPID) were used as modifiers for modification of carbon paste electrode (DPID/NiO-CNT/CPE) for electro-catalytic analysis of glutathione (GSH). The electro-catalytic interaction...
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Quantitative analysis of cellulose acetate with high degree of substitution by FTIR and its application

RSC - Anal. Methods latest articles - Sun, 10/08/2017 - 23:36
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02165H, PaperPengfei Fei, Liang Liao, Bowen Cheng, Jun Song
The degree of substitution (DS) of highly acetylated cellulose acetate (CA) was quantitatively evaluated by FTIR. Seven standard samples, the DS ranging from 1.80-2.85, prepared by mixing appropriate amounts of...
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Simultaneous determination of endogenous hormones and exogenous contaminants in infant formula powdered milk by salting-out assisted liquid-liquid extraction combined with solid-phase extraction purification and UPLC-MS/MS

RSC - Anal. Methods latest articles - Sun, 10/08/2017 - 23:36
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02038D, PaperNing Sun, Qi Guo, Jie-bin Ou
A robust and rapid ultrahigh performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method was developed for the simultaneous determination of four endogenous hormones and exogenous contaminants including progesterone, bisphenol A (BPA),...
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Optimizing extraction and analysis of pharmaceuticals in human urine, struvite, food crops, soil, and lysimeter water by liquid chromatography-tandem mass spectrometry

RSC - Anal. Methods latest articles - Thu, 10/05/2017 - 04:50

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY01801K, PaperRachel A. Mullen, Krista R. Wigginton, Abraham Noe-Hays, Kim Nace, Nancy G. Love, Charles B. Bott, Diana S. Aga
Matrix-specific methods were developed and validated for the analysis of pharmaceuticals in human urine, struvite, soil, and vegetables.
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Hyaluronan-tyrosine-gold nanoparticle as an enzyme-free colorimetric probe for the detection of phosphorothiolate pesticides

RSC - Anal. Methods latest articles - Wed, 10/04/2017 - 20:44
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01969F, PaperLimin Yang, Xiaohui Zhang, Huiping Li, Lei Jang
Detection of organophosphorus pesticides (OPP) is crucial for food safety and environment protection. Here, we propose an enzyme-free strategy for the detection of phosphorothiolate pesticides, a major class of OPP...
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Microfluidic Detection with Acoustic Spectroscopy (MIDAS) for Analysis of Insulin Formulation Stability

RSC - Anal. Methods latest articles - Wed, 10/04/2017 - 20:44
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01846K, PaperCharlie McIntosh, Karen Scida, Sumita Pennathur
Current techniques to analyze insulin, although efficient and accurate, usually require advanced scientific knowledge, chemical labeling, expensive equipment and/or are destructive. Ultrasonic spectroscopy is a viable alternative since it is...
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Simultaneous Detection of Superoxide Anion Radical and Determination of Superoxide Scavenging Activity of Antioxidants Using a N,N-Dimethyl-p-phenylene diamine/Nafion Colorimetric Sensor

RSC - Anal. Methods latest articles - Tue, 10/03/2017 - 19:26
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02132A, PaperFerda Dondurmac[i without dot]oglu, Asl[i without dot] Avan, Resat Apak
The widely used nitroblue tetrazolium (NBT) colorimetric method for superoxide anion radical (O2[round bullet, filled]-) detection suffers from limitations such as formazan solubility and interferences by similar electron-donors. This work reports the...
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Development of an enzyme cycling method by a purine nucleoside phosphorylase for assaying inorganic phosphate

RSC - Anal. Methods latest articles - Tue, 10/03/2017 - 06:20

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY02016C, PaperShigeru Ueda, Shin-ichi Sakasegawa
We have developed a novel enzymatic cycling method that uses purine nucleoside phosphorylase (PNP) (EC 2.4.2.1) from Bacillus sp. to measure inorganic phosphate.
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Separation and detection of free D- and L-amino acids in tea by off-line two-dimensional liquid chromatography

RSC - Anal. Methods latest articles - Mon, 10/02/2017 - 22:13
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01569K, PaperXiangyu Wang, Huihui Wu, Rongying Luo, Donghai Xia, Zhengjin Jiang, Hai Han
D-amino acids are currently paid attention as new physiologically active substances. Foodstuffs and beverages containing D-amino acids are the matter of interest. Until now, the profile of D-amino acids has...
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Determination of benzoic acid and sorbic acid in seasoning by capillary electrophoresis with new triethylamine aminated polychloromethyl styrene nanolatex coated capillary column

RSC - Anal. Methods latest articles - Mon, 10/02/2017 - 22:13
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01930K, PaperWei Tang, Xiangyu Tian, Yanhao Zhang, Dan Yin, Wuduo Zhao, Wenfen Zhang, Shusheng Zhang
In this work, a method for the determination of benzoic acid (BA) and sorbic acid (SA) in soy sauce and vinegar was developed by field-amplified sample stacking open-tubular capillary electrochromatography...
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NIR hyperspectral imaging with multivariate analysis for measurement of oil and protein content in peanut varieties

RSC - Anal. Methods latest articles - Mon, 10/02/2017 - 06:00
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02115A, PaperHuli Jin, Junhu Cheng, Zhongyue Xu, Fuping Zheng
The potential of hyperspectral imaging in the spectral range of 1000-2500 nm with multivariate analysis for prediction of oil and protein concentration in five peanut cultivars was investigated. Quantitative partial...
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CNTs-anchored Cellulose Fluorescent Nanofiber Membranes as Fluorescence Sensor for Cu2+ and Cr3+

RSC - Anal. Methods latest articles - Fri, 09/29/2017 - 05:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01994G, PaperYao Gu, Meiling Wang, Guizhen LI
1,4-Dihydroxyanthraquinone (1,4-DHAQ, a fluorophore) doped carbon nanotubes@cellulose (1,4-DHAQ-doped CNTs@CL) nanofibrous membranes have been prepared via electrospining and subsequent deacetylating in this work. It has been successfully applied for highly sensitive...
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