Potentiometric flow injection system for determination of reductants using a polymeric membrane permanganate ion-selective electrode based on current-controlled reagent delivery
文献类型：期刊论文
| 作者 | Song, Wenjing1,2; Ding, Jiawang1 ; Liang, Rongning1; Qin, Wei1
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| 刊名 | ANALYTICA CHIMICA ACTA
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| 出版日期 | 2011-10-17 |
| 卷号 | 704期号:1-2页码:68-72 |
| 关键词 | Potentiometry Flow injection analysis Ion-selective electrodes Reductants Current-controlled release |
| 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 |
| 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 |
| 中文摘要 | 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. |
| 英文摘要 | 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. 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. |
| 学科主题 | 化学 |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | L-ASCORBIC-ACID ; AMINO-ACIDS ; COPPER WIRE ; FIA SYSTEM ; DETECTOR ; DOPAMINE ; ANIONS |
| 收录类别 | SCI |
| 资助信息 | 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000296824600007 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/5166]  |
| 专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 烟台海岸带研究所_近岸生态与环境实验室 |
| 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 |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：烟台海岸带研究所
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