Wang, Junhao1,3; Liang, Rongning1,4
; Qin, Wei1,2,4发表期刊ANALYTICA CHIMICA ACTA
ISSN0003-2670
2020-12-01
卷号1139页码:1-7
关键词Ion-selective electrodeThin-layer membraneTrace-level analysisNon-classical potentiometric sensorSolid contact
DOI10.1016/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
引用统计被引频次：3[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.cnhttp://ir.yic.ac.cn/handle/133337/27541
专题中科院海岸带环境过程与生态修复重点实验室
中科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 7714Wang, Junhao,Liang, Rongning,Qin, Wei. Thin polymeric membrane ion-selective electrodes for trace-level potentiometric detection[J]. ANALYTICA CHIMICA ACTA,2020,1139:1-7.
APAWang, Junhao,Liang, Rongning,&Qin, Wei.(2020).Thin polymeric membrane ion-selective electrodes for trace-level potentiometric detection.ANALYTICA CHIMICA ACTA,1139,1-7.
MLAWang, 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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