Potentiometric flow injection system for determination of reductants using a polymeric membrane permanganate ion-selective electrode based on current-controlled reagent delivery
Song, Wenjing1,2; Ding, Jiawang1; Liang, Rongning1; Qin, Wei1
2011-10-17
发表期刊ANALYTICA CHIMICA ACTA
卷号704期号:1-2页码:68-72
产权排序Chinese Acad Sci, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China;Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
摘要A polymeric membrane permanganate-selective electrode has been developed as a current-controlled reagent release system for potentiometric detection of reductants in flow injection analysis. By applying an external current, diffusion of permanganate ions across the polymeric membrane can be controlled precisely. The permanganate ions released at the sample-membrane interface from the inner filling solution of the electrode are consumed by reaction with a reductant in the sample solution thus changing the measured membrane potential, by which the reductant can be sensed potentiometrically.Ascorbate, dopamine and norepinephrine have been employed as the model reductants. Under the optimized conditions, the potential peak heights are proportional to the reductant concentrations in the ranges of 1.0 × 10−5 to 2.5 × 10−7 M for ascorbate, of 1.0 × 10−5 to 5.0 × 10−7 M for dopamine, and of 1.0 × 10−5 to 5.0 × 10−7 M for norepinephrine, respectively with the corresponding detection limits of 7.8 × 10−8, 1.0 × 10−7 and 1.0 × 10−7 M. The proposed system has been successfully applied to the determination of reductants in pharmaceutical preparations and vegetables, and the results agree well with those of iodimetric analysis.; A polymeric membrane permanganate-selective electrode has been developed as a current-controlled reagent release system for potentiometric detection of reductants in flow injection analysis. By applying an external current, diffusion of permanganate ions across the polymeric membrane can be controlled precisely. The permanganate ions released at the sample-membrane interface from the inner filling solution of the electrode are consumed by reaction with a reductant in the sample solution thus changing the measured membrane potential, by which the reductant can be sensed potentiometrically. Ascotbate, dopamine and norepinephrine have been employed as the model reductants. Under the optimized conditions, the potential peak heights are proportional to the reductant concentrations in the ranges of 1.0 x 10(-5) to 2.5 x 10(-7) M for ascorbate, of 1.0 x 10(-5) to 5.0 x 10(-7) M for dopamine, and of 1.0 x 10(-5) to 5.0 x 10(-7) M for norepinephrine, respectively with the corresponding detection limits of 7.8 x 10(-8), 1.0 x 10(-7) and 1.0 x 10(-7) M. The proposed system has been successfully applied to the determination of reductants in pharmaceutical preparations and vegetables, and the results agree well with those of iodimetric analysis. (C) 2011 Elsevier B.V. All rights reserved.
通讯作者Qin, W (通讯作者),Chinese Acad Sci, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
关键词Potentiometry Flow Injection Analysis Ion-selective Electrodes Reductants Current-controlled Release
学科领域化学
项目资助者Outstanding Youth Natural Science Foundation of Shandong Province[JQ200814]; Chinese Academy of Sciences; National Natural Science Foundation of China[20977073]; Taishan Scholar Program of Shandong Province
收录类别SCI
关键词[WOS]L-ASCORBIC-ACID ; AMINO-ACIDS ; COPPER WIRE ; FIA SYSTEM ; DETECTOR ; DOPAMINE ; ANIONS
文章类型Article
语种英语
WOS研究方向Chemistry
WOS记录号WOS:000296824600007
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/5166
专题中科院海岸带环境过程与生态修复重点实验室_环境化学实验室
中科院海岸带环境过程与生态修复重点实验室
作者单位1.Chinese Acad Sci, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
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Song, Wenjing,Ding, Jiawang,Liang, Rongning,et al. Potentiometric flow injection system for determination of reductants using a polymeric membrane permanganate ion-selective electrode based on current-controlled reagent delivery[J]. ANALYTICA CHIMICA ACTA,2011,704(1-2):68-72.
APA Song, Wenjing,Ding, Jiawang,Liang, Rongning,&Qin, Wei.(2011).Potentiometric flow injection system for determination of reductants using a polymeric membrane permanganate ion-selective electrode based on current-controlled reagent delivery.ANALYTICA CHIMICA ACTA,704(1-2),68-72.
MLA Song, Wenjing,et al."Potentiometric flow injection system for determination of reductants using a polymeric membrane permanganate ion-selective electrode based on current-controlled reagent delivery".ANALYTICA CHIMICA ACTA 704.1-2(2011):68-72.
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