Analytical Chemistry News

Electrochemical catalysis of artemisinin on hemoglobin functionalized carbon nanofibers

RSC - Anal. Methods latest articles - Thu, 04/20/2017 - 10:11
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00431A, PaperZahilis Mazzochette, Newton Ebenezer, Amos Mugweru
Abstract Artemisinin (ART) is a sesquiterpene lactone and a popular malaria drug used in Asian subcontinent and some parts of Africa. Understanding the mechanism of action of this drug is...
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Automated development of an LC-MS/MS method for measuring multiple vitamin D metabolites using MUSCLE software

RSC - Anal. Methods latest articles - Thu, 04/20/2017 - 10:11
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00550D, PaperCarl Jenkinson, James Bradbury, Angela Taylor, John S Adams, Shan He, Mark Viant, Martin Hewison
Manual development of liquid chromatography tandem-mass spectrometry (LC-MS/MS) methods is a rate limiting step in analytical laboratories, particularly if several compounds have the same multiple reaction monitoring (MRM) transitions. This...
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Development and validation of a novel lateral flow immunoassay device for detection of aflatoxins in soy-based foods

RSC - Anal. Methods latest articles - Wed, 04/19/2017 - 08:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00601B, PaperVanessa Olinto Evangelista, Patricia Barbosa Pelegrini, Fernanda Mulinari, Ariane Lacerda, Rodrigo Moura, Ludimila PV Cardoso, Samira Buhrer-Sekula, Robert NG Miller, Maria Fatima Grossi de Sa
Aflatoxins (AFs) are natural toxins produced as secondary fungal metabolites. Common in diverse commodities, the consumption of aflatoxin-contaminated foodstuffs have harmful effects on human health mainly due to its carcinogenic...
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Preparation of gold nanoparticles coated NaYF4:Yb,Er,Gd nanoparticles and their application for AFP in the red region

RSC - Anal. Methods latest articles - Wed, 04/19/2017 - 08:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00751E, PaperYuanhui Ma, Liping Zhang, Lei Wang, Lun Wang, Hongqi Chen
A novel surface plasmon resonance (SPR) enhanced upconversion (UC) luminescence system was designed for the detection of [small alpha]-fetoprotein (AFP) by using gold nanoparticles (NPs) coated NaYF4:Yb,Er,Gd upconversion nanoparticles (UCNPs). The...
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Gold Nanoparticle Aggregation Enables Colorimetric Sensing Assays for Enzymatic Decarboxylation

RSC - Anal. Methods latest articles - Wed, 04/19/2017 - 08:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00642J, CommunicationMohamed Nilam, Andreas Hennig, Werner M Nau, Khaleel I. Assaf
Monitoring enzymatic processes is of fundamental importance for the understanding of the associated biological phenomena. In this work, we show that amino acid decarboxylase activity can be readily monitored by...
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A fluorescent probe for specific lysosomes imaging in cells

RSC - Anal. Methods latest articles - Wed, 04/19/2017 - 07:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00524E, CommunicationNa Jiang, Bin Wang, Gengxiu Zheng, Yujing Xing, Chunxiao Wang, Qiufen Wang
Lyso-NA, a naphthalimide-based fluorescent probe is synthesized. M-DPT is found to possess high specificity to lysosome, superior photostability, and appreciable tolerance to microenvironmental changes. Thus, this probe is a highly...
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Biomonitoring method for the analysis of chromium and cobalt in human whole blood using inductively coupled plasma - kinetic energy discrimination - mass spectrometry (ICP-KED-MS)

RSC - Anal. Methods latest articles - Wed, 04/19/2017 - 07:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00430C, PaperJoaudimir Castro Georgi, Yuliya L. Sommer, Cynthia D Ward, Po-Yung Cheng, Robert L Jones, Kathy Caldwell
The Centers for Disease Control and Prevention developed a biomonitoring method to rapidly and accurately quantify chromium and cobalt in human whole blood by ICP-MS. Many metal-on-metal hip implants which...
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Development and optimization of a fast method for determination of statins in human plasma using microextraction by packed sorbent (MEPS) followed by ultra high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS)

RSC - Anal. Methods latest articles - Tue, 04/18/2017 - 10:48
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00185A, PaperScarlet Ortega, Alvaro dos Santos Neto , Fernando M Lancas
Miniaturized sample preparation techniques are very attractive in bioanalysis since reduced size of sample is required. Regarding that matter, an ultra high-performance liquid chromatographic-tandem mass spectrometry (UHPLC-MS/MS) microextraction by packed...
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An azidocoumarin-based fluorescent probe for imaging lysosomal hydrogen sulfide in living cells

RSC - Anal. Methods latest articles - Tue, 04/18/2017 - 09:46
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00862G, PaperQiao-Ling Xie, Wei Liu, Xianjun Liu, Fan Ouyang, Yong-Qing Kuang, Jian-Hui Jiang
A commercially available fluorescent hydrogen sulfide (H2S) probe 7-azido-4-methylcoumarin (AzMC) was developed into its lysosome-targeted counterpart Lyso-C via a four-step synthetic approach. Lyso-C displayed fast response (within 5 min), excellent...
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Au nanoparticles anchored on Ni(OH)2 nanowires with multicavities for selective electrochemical detection of dopamine

RSC - Anal. Methods latest articles - Tue, 04/18/2017 - 07:45
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00090A, PaperYanyi Fu, Qingling Sheng, Jianbin Zheng
Au nanoparticles supported on nickel hydroxide nanowires with multicavities (Au/m-Ni(OH)2) were synthesized and used for the enhanced electrochemical sensing of dopamine (DA). m-Ni(OH)2 nanowires were first fabricated based on an...
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Determination of Chloride and Nitrate in Dimethyl Carbonate with Column-Switching Ion Chromatography System

RSC - Anal. Methods latest articles - Mon, 04/17/2017 - 07:39
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00906B, PaperDandan Guo, Chaoyan Lou, Meilan Chen, Binghe Zhu, Peimin Zhang, Nani Wang, Yan Zhu
Dimethyl carbonate (DMC) has been widely used in solvent, fuels, monomers and synthesis. Inorganic anions in DMC always have a big impact on product performance. An improvement has been performed...
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Detection of herbicide glyphosates based on anti-aggregation mechanism by using unmodified gold nanoparticles in presence of Pb2+

RSC - Anal. Methods latest articles - Mon, 04/17/2017 - 06:39
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00426E, PaperZhuangwei Zhou, Yujie Zhang, Jingyan Kang, Chen Dong, Ningyi Chen, Xing Li, Zhiyong Guo, Aiguo Wu
In this study, a new detection method for glyphosate (GPS) based on anti-aggregation mechanism by using gold nanoparticles (AuNPs) is proposed. A certain amount of Pb2+ can cause the aggregation...
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Two Orders of Magnitude Electrokinetic Stacking of Protein in One Minute on a Simple Paper Fluidic Channel

RSC - Anal. Methods latest articles - Mon, 04/17/2017 - 05:38
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00582B, PaperBiao Ma, Songfang Xie, Lei Liu, Fang Fang, Zhi-Yong Wu
A crucial challenge in development of robust paper-based analytical devices (PADs) is the lack of sensitivity. Electrokinetic stacking is a kind of unique sample preconcentration for low abundant charged species,...
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Sensitive and rapid assay of BNP in patient blood by micro-ELISA

RSC - Anal. Methods latest articles - Mon, 04/17/2017 - 05:38
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00479F, PaperEmi Mori, Toshinori Ohashi, Yasushi Imai, Kazuma Mawatari, Takehiko Kitamori
Microfluidic immunoassay is expected to be a next-generation diagnostic method due to the small size and high performance. Various tests will be performed in clinics or for home medical care....
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A Simplified Approach in Flow Controlled Multi-dimensional Gas Chromatography

RSC - Anal. Methods latest articles - Mon, 04/17/2017 - 04:38
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00433H, PaperJim Luong, Ronda Gras, Robert A. Shellie
We introduce a simple and reliable approach for practicing flow controlled multi-dimensional gas chromatography. The approach eliminates the need for flow resistance balancing. Flow resistance balancing between the flow restrictor...
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Recent progress in application of nanomaterials in analysis of emerging chemical contaminants

RSC - Anal. Methods latest articles - Thu, 04/13/2017 - 10:07
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00859G, Critical ReviewXiu Huang, Qian Liu, Shouzhuo Yao, Guibin Jiang
Emerging chemical contaminants (ECCs) represent newly identified chemical contaminants which have not been covered by routine monitoring and regulatory programs. Current research into ECCs is greatly hindered by the shortage...
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A red fluorescent turn-on chemosensor for Al3+ based on dimethoxy triphenylamine-benzothiadiazole derivative with aggregation-induced emission

RSC - Anal. Methods latest articles - Thu, 04/13/2017 - 06:07
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00145B, PaperJianli Hua, Niannian Lu, Tao Jiang, Haoqi Tan, Yandi Hang, Ji Yang, Jian Wang, Xue Qu
Aluminum is a known neurotoxin to organisms and believed to cause Alzheimer's disease, osteomalacia and breast cancer. Effective tools for Al3+ recognition are thus in great demand. In this paper,...
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A highly sensitive and label-free electrochemiluminescence immunosensor for beta 2-microglobulin

RSC - Anal. Methods latest articles - Thu, 04/13/2017 - 05:07
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00263G, PaperMohammad Rizwan, Noor Faizah Mohd-Naim, Natasha Ann Keasberry, Minhaz Uddin Ahmed
A highly sensitive and label-free electrochemiluminescence (ECL) immunosensor was fabricated for the detection of [small beta]-2-Microglobulin ([small beta]2M) based on gold nanoparticles-doped@carbon nano-onions chitosan nanocomposite modified cadmium selenide quantum dots screen-printed electrode...
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Comparison of different GC-MS configurations for the determination of prevalent drugs and related metabolites.

RSC - Anal. Methods latest articles - Wed, 04/12/2017 - 14:00
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00813A, PaperJorge Saiz, Carmen Garcia Ruiz, Belen Gomara
Cocaine, cannabis, heroin, and other opioids are among the prevalent drugs in Europe. The use of these drugs is demonstrated by the determination of either parent drugs or related metabolites...
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Optimization of a methodology for simultaneous determination of twelve chlorophenols in environmental water samples using in situ derivatization and continuous sample drop flow microextraction combined with gas chromatography-electron-capture detection

RSC - Anal. Methods latest articles - Wed, 04/12/2017 - 13:00
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00530J, PaperMostafa Karimaei, Kiomars Sharafi, Masoud Moradi, Hamid Reza Ghaffari, Hamed Biglari, Hossein Arfaeinia, Nazir Fattahi
The continuous sample drop flow microextraction (CSDFME) joined with the gas chromatography-electron-capture detection (GC-ECD) has been developed as a high preconcentration technique for the determination of chlorophenols (CPs) in environmental...
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