Analytical Chemistry News

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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An effective signal enhancement strategy for sensing cysteine based on aluminium-initiated emission

RSC - Anal. Methods latest articles - Fri, 09/29/2017 - 04:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02026K, PaperZou Wu , Xuejiao Chen, Huan Cheng , Tingting Gu, Xia Jiaoyun, Chen Can, Fu Chun Gong
An efficient signal enhancement strategy for the detection of cysteine(Cys) was developed, which is based on the combination of Cys-reduced reaction with the chelation of Al3+ with the Cys-promoted product....
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PH-sensing fluorescence oligonucleotide probes based on an i-motif scaffold: A review.

RSC - Anal. Methods latest articles - Thu, 09/28/2017 - 09:45
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01942D, Critical ReviewAnna Dembska, Patrycja Bielecka, B. Juskowiak
Fluorescence-based approaches have found widespread applications in cell biology. The pH-sensing using fluorescent i-motifs is a potentially useful strategy for real-time, in vivo monitoring of important cellular processes. I-motif scaffold...
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Advantages of aptamers as ligands upon protein detection by AFM-based fishing

RSC - Anal. Methods latest articles - Thu, 09/28/2017 - 07:45
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01216K, PaperTatyana Pleshakova, Anna Kaysheva, Jana Bayzyanova, Anna Anashkina, Vasiliy Uchaikin, Ivan Shumov, Vadim Ziborov, Vladimir Konev, Alexander Archakov, Yuri Ivanov
Combined AFM/MS method was employed for protein registration in solution. This method is based on reversible specific capturing of target protein from a large volume of analyzed solution onto a...
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A SPR aptamer sensor for mercury based on AuNPs@NaYF4:Yb,Tm,Gd upconversion luminescence nanoparticles

RSC - Anal. Methods latest articles - Thu, 09/28/2017 - 04:43
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01810J, PaperBo Ling, Yuanhui Ma, Hongqi Chen, Lun Wang
A new aptamer-based surface plasmon resonance (SPR) system has been designed to detect Hg2+ that utilizes near-infrared (NIR)-to-NIR gold nanoparticles coated NaYF4:Yb,Tm,Gd up-conversion nanoparticles (AuNPs@NaYF4:Yb,Tm,Gd UCNPs) as a probe. The...
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Preparation of a novel restricted access material combined to molecularly imprinted polymer for selective solid-phase extraction and gas chromatography determination of heptachlor, endosulfan and their metabolites residues in pork

RSC - Anal. Methods latest articles - Wed, 09/27/2017 - 04:23
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01941F, PaperHai Gen Zuo, Yang Hong, Jianxin Zhu, Yuan Ding
A novel method was established using a restricted access material combined to molecularly imprinted polymer (RAM-MIP) as sorbent material in solid phase extraction (SPE) for clean-up of[small alpha]-endosulfan, [small beta]-endosulfan, endosulfate, endosulfan-ether,...
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Sphingosine and dihydrosphingosine as biomarkers for multiple sclerosis identified by metabolomic profiling using coupled UPLC-MS

RSC - Anal. Methods latest articles - Mon, 09/25/2017 - 07:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01922J, PaperSean Ward, Michael I Page, Patrick McHugh, Nicholas Trevor Powles
The project aim was to identify differences in the metabolomic profiles in the serum of patients with multiple sclerosis (MS), those with neuropathic pain (NP) and those with both MS...
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