Novel structured light-addressable potentiometric sensor array based on PVC membrane for determination of heavy metals

被引：30

作者：

Ha, D. ^{[1
]}

Hu, N. ^{[1
]}

Wu, C. X. ^{[1
]}

Kirsanov, Dmitry ^{[2
]}

Legin, Andrey ^{[2
]}

Khaydukova, Maria ^{[2
]}

Wang, P. ^{[1
]}

机构：

[1] Zhejiang Univ, Biosensor Natl Special Lab, Key Lab Biomed Engn, Educ Minist,Dept Biomed Engn, Hangzhou 310027, Peoples R China

[2] St Petersburg State Univ, Lab Chem Sensors, Dept Chem, St Petersburg 199034, Russia

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2012年 / 174卷

关键词：

Light-addressable potentiometric sensor (LAPS) array; PVC membrane; Cross-talk rejection; Ion-selectivity; Heavy metal cations; BIOSENSOR;

D O I：

10.1016/j.snb.2012.06.032

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The paper discussed a novel structured light-addressable potentiometric sensor (LAPS) array based on PVC membrane for determination of heavy metal cations simultaneously. For LAPS array fabrication, part of the silicon substrate which was defined as non-sensitive area was heavily doped with boron and had thick oxide formation. Then PVC (polyvinyl chloride) membrane for respective cations (Pb2+, Cb2+, Zn2+) was prepared uniformly on corresponding sensitive area. Through new structure, the elaborated LAPS array had the advantages of excellent calibration stability (e.g. lower standard deviation from +/- 3.1 mV to +/- 0.5 mV for Pb-LAPS) and reasonable good selectivity. Sensors based on these membranes had showed a Nernstian response of slope (28.7-29.3 mV/dec) over the concentration ranges of 10(-5) to 10(-1), mol/L. At the meantime, the electrochemical behavior in terms of the detection limit, linear response range, response time, long-time stability and effect of silanization had also been investigated. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：59 / 64

页数：6

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