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Electrochemical Behavior of Nicotine at Unmodified Carbon Paste Electrode and Its Determination in a Set of Refilling Liquids for Electronic Cigarettes

16-10-2014 | Matěj Stočes, Ivan Švancara, Electroanalysis, 2014

Abstract In this manuscript, a carbon paste electrode (CPE) from traditional components has been used to study the electrochemical oxidation of nicotine and its feasibility to be performed at unmodified and otherwise untreated carbon paste in an effort to propose a simple voltammetric method ...

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Molar‐Mass Analysis of Dendrigraft Poly(l‐lysine) (DGL) Polyelectrolytes by SEC‐MALLS: The “Cornerstone” Refractive Index Increment

15-10-2014 | Barbara Maret, Agnès Crépet, Clément Faye, Laurent Garrelly, Catherine Ladavière, Macromolecular Chemistry and Physics, 2014

Dendrigraft poly(l‐lysine) (DGL) polyelectrolytes, obtained by iterative polycondensation of N‐trifluoroacetyl‐l‐lysine‐N‐carboxyanhydride, constitute very promising candidates in many biomedical applications. In order to get a better understanding of their structure–property relationships in ...

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Sensitive and selective colorimetric detection of Cu2+ in aqueous medium via aggregation of thiomalic acid functionalized Ag nanoparticles

14-10-2014 | Vairaperumal Tharmaraj; Jyisy Yang, Analyst, 2014

A simple and effective colorimetric method for determination of copper ion was developed in this work. In this method, thiomalic acid functionalized silver nanoparticles (TMA-AgNPs) were prepared and the changes of solution color, which induced by the aggregation of TMA-AgNPs in the presence of ...

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Enhanced amperometric sensing for direct detection of nitenpyram via synergistic effect of copper nanoparticles and nitrogen-doped graphene

12-10-2014 | Author(s): Xiaoya Dong , Ding Jiang , Qian Liu , En Han , Xinai Zhang , Xianping Guan , Kun Wang , Baijing Qiu, Journal of Electroanalytical Chemistry, 2014

Publication date: Available online 5 October 2014 Source:Journal of Electroanalytical Chemistry Author(s): Xiaoya Dong , Ding Jiang , Qian Liu , En Han , Xinai Zhang , Xianping Guan , Kun Wang , Baijing Qiu In this work, a novel electrochemical sensing platform has been designed for ...

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Emulsification Based Liquid Microextraction Prior to Flame Atomic Absorption Spectrometry for Sensitive Determination of Copper in Water Samples

09-10-2014 | Mahdi Zahedi, Mir; Rahimi-Nasrabadi, Mehdi; Rai, Hossein; Mahdi Pourmortazavi, Seied; Banan, Alireza, Current Analytical Chemistry, 2014

Abstract: In this study emulsification based liquid microextraction (EBLME) was developed for preconcentration of Cu(II) using a redesigned dispersive liquid - liquid microextraction (DLLME). The procedure is based on an organic extraction solvent and aqueous solution of surfactant system ...

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Selective Ligandless Cloud Point Extraction of Gold from Wastewater and ore Samples

09-10-2014 | Zia Mohammadi, Sayed; Mohammadnezhad, Mohsen; Afzali, Daryoush; Amiri, Asghar, Current Analytical Chemistry, 2014

Abstract: A selective and sensitive cloud point extraction procedure for the preconcentration of trace amounts of gold prior to their determination by flame atomic absorption spectrometry has been developed. The cloud point extraction method is based on the formation AuI3 and then entrapped ...

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Heat‐shrink tubing as a solid‐phase microextraction coating for the enrichment and determination of phthalic acid esters

09-10-2014 | Xi Luo, Chengxia He, Feifang Zhang, Hailong Wang, Bingcheng Yang, Xinmiao Liang, Journal of Separation Science, 2014

Heat‐shrink tubing, which shrinks in one plane only (its diameter) when heated, commonly used for sealing protection in electrical engineering, was found to be able to function as a solid‐phase microextraction coating. Its utility was demonstrated for the determination of phthalic acid esters in ...

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Simultaneous Determination of Cu‐EDTA and Its Degradation Intermediates by Capillary Electrophoresis with a Capacitively Coupled Contactless Conductivity Detector

08-10-2014 | Shenyu Lan, Ya Xiong, Shuanghong Tian, Lianpeng Sun, Tianyao Xie, Xin Wang, Lingjun Kong, Electroanalysis, 2014

Abstract A method of capillary electrophoresis (CE) with capacitively coupled contactless conductivity detector (C4D) was developed to detect Cu‐EDTA and its degradation intermediates simultaneously. The target compounds included oxalic acid, EDTA, Cu‐EDTA, glyoxylic acid, iminodiacetic acid, ...

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Molecular Co(II) and Co(III) Heteroarylalkenolates as Efficient Precursors for Chemical Vapor Deposition of Co3O4 Nanowires

02-10-2014 | Mehtap Büyükyazi; Corinna Hegemann; Thomas Lehnen; Wieland Tyrra; Sanjay Mathur, Inorganic Chemistry, 2014

Two new cobalt precursors, CoII(PyCHCOCF3)2(DMAP)2 (1) and CoIII(PyCHCOCF3)3 (2), based on Co(II) and Co(III) centers were synthesized using a redox active ligand system. The different chemical configurations of 1 and 2 and differential valence states of cobalt were confirmed by crystal structure ...

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Microwave‐assisted liquid–liquid microextraction based on solidification of ionic liquid for the determination of sulfonamides in environmental water samples

01-10-2014 | Ying Song, Lijie Wu, Chunmei Lu, Na Li, Mingzhu Hu, Ziming Wang, Journal of Separation Science, 2014

An easy, quick and green method, microwave‐assisted liquid–liquid microextraction based on solidification of ionic liquid was first developed and applied to the extraction of sulfonamides in environmental water samples. 1‐Ethy‐3‐methylimidazolium hexafluorophosphate, which is a solid‐state ionic ...

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