Current pulse based ion-selective electrodes for chronopotentiometric determination of calcium in seawater
文献类型：期刊论文
| 作者 | Liu, Shuwen; Ding, Jiawang ; Qin, Wei
|
| 刊名 | ANALYTICA CHIMICA ACTA
 |
| 出版日期 | 2018-11-15 |
| 卷号 | 1031页码:67-74 |
| 关键词 | Chronopotentiometry Ion-selective electrode Calcium Seawater Current pulse |
| ISSN号 | 0003-2670 |
| DOI | 10.1016/j.aca.2018.06.018 |
| 产权排序 | [Liu, Shuwen ; Ding, Jiawang ; Qin, Wei] Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Prov Key Lab Coastal Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China ; [Ding, Jiawang ; Qin, Wei] Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266237, Peoples R China ; [Liu, Shuwen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 文献子类 | Article |
| 英文摘要 | Calcium is closely related to the oceanic biosphere and carbonate system. Potentiometry based on a calcium-selective electrode (Ca-ISE) represents a promising tool for detection of calcium ion activities in seawater. This technique, however, generally is limited by the low sensitivity for the inherent Nernstian response (i.e. ca 30 mV/dec). A current pulse based ion-selective electrode with enhanced sensitivity for chronopotentiometric measurements of calcium in seawater is proposed. The Ca2+-selective membrane containing lipophilic salt ETH 500 instead of traditional ion-exchanger is galvanostatically controlled. An applied constant cathodic current pulse can leads to the extraction of the calcium ions into the membrane to produce a chronopotential response, which shows a stable and reproducible super-Nernstian response in a narrow calcium activity range. The super-Nernstian region of the electrode depends on not only the the magnitude and duration of the applied current pulse but also the interfering ions. Under optimal conditions, the proposed Ca-ISE exhibits a super-Nernstian response between the calcium concentrations of 10(-)(2.5)-10(-)(1.5)M with a slope of ca 80 mV/dec. The current pulse based Ca-ISE has been applied to determination of calcium in seawater with satisfactory results. (C) 2018 Published by Elsevier B.V. |
| WOS关键词 | GALVANOSTATIC CONTROL ; MASS-SPECTROMETRY ; ALKALINITY ; MAGNESIUM ; HEPARIN ; RATIOS ; CARBON ; WATER ; SEA ; SPECIATION |
| WOS研究方向 | Chemistry, Analytical |
| 语种 | 英语 |
| WOS记录号 | WOS:000441511600007 |
| 资助机构 | National Natural Science Foundation of China [21575158, 21677172] ; Chinese Academy of Sciences [Y728021021] ; National Key Research and Development Program of China [2016YFC1400700] ; CAS Youth Innovation Promotion Association [2014190] ; Taishan Scholar Program of Shandong Province [TS20081159] |
| 源URL | [http://ir.yic.ac.cn/handle/133337/24576]  |
| 专题 | 烟台海岸带研究所_近岸生态与环境实验室 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 |
| 作者单位 | 1.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266237, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Prov Key Lab Coastal Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Liu, Shuwen,Ding, Jiawang,Qin, Wei. Current pulse based ion-selective electrodes for chronopotentiometric determination of calcium in seawater[J]. ANALYTICA CHIMICA ACTA,2018,1031:67-74. |
| APA | Liu, Shuwen,Ding, Jiawang,&Qin, Wei.(2018).Current pulse based ion-selective electrodes for chronopotentiometric determination of calcium in seawater.ANALYTICA CHIMICA ACTA,1031,67-74. |
| MLA | Liu, Shuwen,et al."Current pulse based ion-selective electrodes for chronopotentiometric determination of calcium in seawater".ANALYTICA CHIMICA ACTA 1031(2018):67-74. |
入库方式： OAI收割
来源：烟台海岸带研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。