A NEW ISFET DEVICE FOR COCAINE ANALYSIS

被引：6

作者：

CAMPANELLA, L ^{[1
]}

COLAPICCHIONI, C ^{[1
]}

TOMASSETTI, M ^{[1
]}

BIANCO, A ^{[1
]}

DEZZI, S ^{[1
]}

机构：

[1] UNIV ROMA LA SAPIENZA,IST MED LEGALE,I-00161 ROME,ITALY

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1995年 / 24卷 / 1-3期

关键词：

ISFETS; COCAINE HYDROCHLORIDE; ANALYSIS;

D O I：

10.1016/0925-4005(95)85040-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We have fabricated and characterized two new cocaine-sensitive ISFET devices based on a PVC-sebacate membrane containing cocaine-reineckate or cocaine-tetraphenylborate as exchanger. Both the ISFET sensors display a linearity range for cocaine hydrochloride between about 3X10(-6) and 2X10(-2) mol l(-1) and a fast response (less than or equal to 25 s), which remain almost the same in the pH range 3-7. For the cocaine-reineckate and cocaine-tetraphenylborate ISFETs, the slope values are -53.9 and -51.3 Delta mV/Delta log c (c=mol l(-1)), and the precision of the measurements, as 'pooled SD%' is 1.1 or 3.5, respectively. Selectivity coefficient values for several possible interferences have been determined and the application of these sensors to the analysis of authentic samples containing cocaine and other substances commonly associated with it is also reported.

引用

页码：188 / 193

页数：6

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