Mercury ion selective light addressable potentiometric sensor based on PVC membrane

被引：2
|
作者：
Li Y. [1 ]
Zhang Z.-N. [1 ]
Cai W. [1 ]
Gao X.-M. [1 ]
Wang P. [1 ]
机构：
[1] Biosensor National Special Laboratory, Department of Biomedical Engineering, Zhejiang University
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2010年 / 44卷 / 06期
关键词：
Light addressable potentiometric sensor (LAPS); Mercury ion sensor; Neutral carrier-based polymer membrane;
D O I：
10.3785/j.issn.1008-973X.2010.06.033
中图分类号：
学科分类号：
摘要：
A novel polyvinyl chloride(PVC) thin-film light addressable potentiometric sensor sensitive to mercury (II) ion was tested by gradient concentrations. PVC matrix with 5-amino-1, 3, 4-thiadiazole-2-thiol was prepared and used as target material. Light addressable potentiometric sensor(LAPS) sensor was chemically modified by silanization. The sensitivities before and after the reaction are 67.299 mV per pH and 4.999 6 mV per pH, the linear correlations are 0.983 1 and 0.987 7, respectively. Once PVC membrane was deposited, Hg2+ sensitive LAPS exhibits a good stability and repetition. The sensitivity of the potentiometric response shows the slope of 15.381 mV per pHg. The detection limit of the sensor was 1.57 μg/L. The response time maintained 2-4 s, and the application range of pH was located between 3-6.
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页码：1231 / 1236
页数：5
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