BULK OPTODES BASED ON NEUTRAL DITHIOCARBAMATE IONOPHORES WITH HIGH SELECTIVITY AND SENSITIVITY FOR SILVER AND MERCURY CATIONS

被引：134

作者：

LERCHI, M

REITTER, E

SIMON, W

PRETSCH, E

CHOWDHURY, DA

KAMATA, S

机构：

[1] ETH ZURICH,DEPT ORGAN CHEM,CH-8092 ZURICH,SWITZERLAND

[2] KAGOSHIMA UNIV,FAC ENGN,DEPT CHEM ENGN & APPL CHEM,KAGOSHIMA 890,JAPAN

来源：

ANALYTICAL CHEMISTRY | 1994年 / 66卷 / 10期

关键词：

D O I：

10.1021/ac00082a019

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Membranes for optically sensing Ag+ and Hg2+ based on plasticized poly(vinyl chloride) (PVC) containing a metal ion-selective ionophore, a hydrogen ion-selective chromoionophore, and lipophilic anionic sites are presented. Different dithiocarbamate ionophores have been used to develop novel optical sensors for environmental analysis. Optode membranes based on the ionophore methylene bis(diisobutyldithiocarbamate) (MBDiBDTC) reversibly respond to Ag+ and Hg2+ and show extremely high selectivities over Li+, Na+, K+, Mg2+, Cu2+, Cd2+, and Pb2+. The detection limit for Ag+ is 2.5 x 10(-9) M at pH 4.7. The dynamic range, response behavior, reversibility, and selectivity of the optode membranes are discussed.

引用

页码：1713 / 1717

页数：5

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