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Asymmetric anion‐selective membrane electrode for determining nitric oxide release rates from polymeric films/electrochemical devices.

29-Jul-2015 | Joanna Zajda, Natalie R. Crist, Elżbieta Malinowska, Mark E. Meyerhoff, Electroanalysis, 2015

Abstract A novel potentiometric method for the determination of nitric oxide (NO) is presented. The assessment of NO levels is based on the rapid reaction of NO with oxyhemoglobin, during which nitrate is formed and then detected potentiometrically using a polymeric membrane anion‐selective ...

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Voltammetric determination of cocaine using carbon screen printed electrodes chemically modified with uranyl Schiff base films

28-Jul-2015 | Maria Fernanda Muzetti Ribeiro, José Wilmo da Cruz Júnior, Edward Ralph Dockal, Bruce Royston McCord, Marcelo Firmin ..., Electroanalysis, 2015

Abstract Chemically modified screen printed electrodes (CM‐SPE) using [UO2(4‐MeOSalen)(H2O)] ⋅ H2O films were employed in the voltammetric determination of cocaine. The chemical modification was performed by dip coating electrode surfaces (carbon, gold, and platinum) with methanolic solution ...

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Non‐Uniform Sampling and J‐UNIO Automation for Efficient Protein NMR Structure Determination

28-Jul-2015 | Tatiana Didenko, Andrew Proudfoot, Samit Kumar Dutta, Pedro Serrano, Kurt Wüthrich, Chemistry - A European Journal, 2015

Abstract High‐resolution structure determination of small proteins in solution is one of the big assets of NMR spectroscopy in structural biology. Improvements in the efficiency of NMR structure determination by advances in NMR experiments and automation of data handling therefore attracts ...

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Determination of kinetics of CO2 absorption in solutions of 2‐amino‐2‐methyl‐1‐propanol using a microfluidic technique

27-Jul-2015 | C. Zheng, B.C. Zhao, K. Wang, G.S. Luo, AIChE Journal, 2015

Abstract The kinetics for the reactions of carbon dioxide with 2‐amine‐2‐methyl‐1‐propanol (AMP) and carbon dioxide (CO2) in both aqueous and nonaqueous solutions were measured using a microfluidic method at a temperature range of 298‐318 K. The mixtures of AMP‐water and AMP‐ethylene glycol ...

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Electrochemical Determination of Cu(II) Using a Glassy Carbon Electrode Modified with Multiwall Carbon Nanotubes Dispersed in Polyhistidine

23-Jul-2015 | Pablo R. Dalmasso, María L. Pedano, Gustavo A. Rivas, Electroanalysis, 2015

Abstract We report the sensitive and selective quantification of Cu(II) at glassy carbon electrodes (GCE) modified with multiwall carbon nanotubes (MWCNT) dispersed in polyhistidine (Polyhis), (GCE/MWCNTPolyhis) based on the complexation of Cu(II) by the histidine residues and further ...

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Magnetic molecularly imprinted polymers synthesized by surface‐initiated reversible addition‐fragmentation chain transfer polymerization for the enrichment and determination of synthetic estrogens in aqueous solution

23-Jul-2015 | Fangfang Chen, Jingjing Zhang, Minjun Wang, Jie Kong, Journal of Separation Science, 2015

J. Sep. Sci. 2015, 38, 2670–2676 DOI: 10.1002/jssc.201500407 The novel magnetic molecularly imprinted polymers for enrichment of synthetic estrogens were synthesized via surface‐initiated reversible addition addition‐fragmentation chain transfer polymerization using diethylstilbestrol ...

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Direct Determination of Trace Antimony in Natural Waters by Photochemical Vapor Generation ICPMS: Method Optimization and Comparison of Quantitation Strategies

22-Jul-2015 | Ying Gao; Ralph E. Sturgeon; Zoltán Mester; Xiandeng Hou; Chengbin Zheng; Lu Yang, Analytical Chemistry, 2015

A novel and sensitive approach for the accurate determination of antimony (Sb) in natural waters is described using photochemical vapor generation (PVG) coupled with inductively coupled plasma mass spectrometry (ICPMS) for detection. Utilizing a unique flow-through photochemical reactor capable ...

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A capillary electrophoresis method for speciation of iron (II) and iron (III) in pharmaceuticals by dual pre‐capillary complexation

20-Jul-2015 | Roberto Gotti, Jessica Fiori, Lino Liverani, Franco Spelta, ELECTROPHORESIS, 2015

Pharmaceutical iron sucrose is an iron (III) replacement for the treatment of iron deficiency anemia in patients with chronic kidney disease. The drug product (injection) is a colloidal solution of ferric hydroxide in complex with sucrose, containing 20 mg/mL elemental iron; according to USP, ...

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Efficient generation of volatile cadmium species using Ti(III) and Ti(IV) and application to determination of cadmium by cold vapor generation inductively coupled plasma mass spectrometry (CVG-ICP-MS)

20-Jul-2015 | Author(s): Zikri Arslan, Vedat Yilmaz, LaKeysha Rose, Microchemical Journal, 2015

Publication date: November 2015 Source:Microchemical Journal, Volume 123 Author(s): Zikri Arslan, Vedat Yilmaz, LaKeysha Rose In this study, a highly efficient chemical vapor generation (CVG) approach is reported for determination of cadmium (Cd). Titanium (III) and titanium (IV) were ...

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Simultaneously determination of trace Cd2+ and Pb2+ based on l-cysteine/graphene modified glassy carbon electrode

20-Jul-2015 | Author(s): Wenshu Zhou, Caihong Li, Chong Sun, Xiaodi Yang, Food Chemistry, 2015

Publication date: 1 February 2016 Source:Food Chemistry, Volume 192 Author(s): Wenshu Zhou, Caihong Li, Chong Sun, Xiaodi Yang In this paper, l-cysteine/graphene–CS/GCE (l-cys/GR–CS/GCE) was prepared successfully, and its electrochemical properties were characterized by cyclic ...

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