Institutional Repository of Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (KLCEP)
Thin polymeric membrane ion-selective electrodes for trace-level potentiometric detection | |
Wang, Junhao1,3; Liang, Rongning1,4; Qin, Wei1,2,4 | |
发表期刊 | ANALYTICA CHIMICA ACTA |
ISSN | 0003-2670 |
2020-12-01 | |
卷号 | 1139页码:1-7 |
关键词 | Ion-selective electrode Thin-layer membrane Trace-level analysis Non-classical potentiometric sensor Solid contact |
DOI | 10.1016/j.aca.2020.09.024 |
通讯作者 | Liang, Rongning(rnliang@yic.ac.cn) ; Qin, Wei(wqin@yic.ac.cn) |
英文摘要 | In this work, we describe a novel method to improve the detection limits of the non-classical polymeric membrane ion-selective electrodes (ISEs) which are conditioned with highly discriminated ions instead of primary ions. It is based on a thin-layer ISE membrane with a thickness of 5 mm, which is coated on ordered mesoporous carbon used as solid contact. The diffusion of the primary ion from the surface of the sensing membrane to the bulk of the membrane could be avoided by the proposed thin membrane configuration. Since the detection sensitivity of the non-classical ISEs depends on the accumulation of the primary ion in the interfacial layer of the sensing membrane, a lower detection limit can be obtained. By using the copper ion as a model, the present potentiometric sensor shows a significantly improved detection sensitivity compared to the conventional ISE with a membrane thickness of ca. 200 mm. Low detection limits of 0.29 and 0.53 nM can be obtained in 0.01 and 0.5 M NaCl, respectively. In addition, the proposed sensor exhibits an excellent reversibility by using a neutral proton-selective ionophore incorporated in the thin membrane. (C) 2020 Elsevier B.V. All rights reserved. |
资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; Youth Innovation Promotion Association of CAS ; Taishan Scholar Program of Shandong Province |
收录类别 | SCI |
语种 | 英语 |
关键词[WOS] | IONOPHORE-BASED MEMBRANE ; DETECTION LIMIT ; BULK OPTODES ; COEFFICIENTS ; SENSORS |
研究领域[WOS] | Chemistry |
WOS记录号 | WOS:000595167700001 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.yic.ac.cn/handle/133337/27541 |
专题 | 中国科学院海岸带环境过程与生态修复重点实验室 中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室 |
通讯作者 | Liang, Rongning; Qin, Wei |
作者单位 | 1.Chinese Acad Sci, Shandong Key Lab Coastal Environm Proc, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Biol & Biotechnol, Qingdao 266237, Shandong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Junhao,Liang, Rongning,Qin, Wei. Thin polymeric membrane ion-selective electrodes for trace-level potentiometric detection[J]. ANALYTICA CHIMICA ACTA,2020,1139:1-7. |
APA | Wang, Junhao,Liang, Rongning,&Qin, Wei.(2020).Thin polymeric membrane ion-selective electrodes for trace-level potentiometric detection.ANALYTICA CHIMICA ACTA,1139,1-7. |
MLA | Wang, Junhao,et al."Thin polymeric membrane ion-selective electrodes for trace-level potentiometric detection".ANALYTICA CHIMICA ACTA 1139(2020):1-7. |
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