Optical fibre reflectance sensors for the detection of heavy metal ions based on immobilised Br-PADAP

被引:42
作者
Vaughan, AA [1 ]
Narayanaswamy, R [1 ]
机构
[1] UMIST, Dept Instrumentat & Analyt Sci, Manchester M60 1QD, Lancs, England
关键词
optical sensor; heavy metals; immobilised reagent;
D O I
10.1016/S0925-4005(98)00224-X
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Optical fibre based reflectance sensors for the detection of heavy metal ions have been developed based on the use of the immobilised reagent Br-PADAP. Two methods of immobilisation, namely physical adsorption and membrane entrapment, have been employed and their relative merits have been discussed. Br-PADAP immobilised onto XAD-4 shows a reproducible and reversible response to heavy metal ions and a good limit of detection (31 ppb for Zn(II) with an analysis time of 6 min). Br-PADAP/PVC membranes show fairly quick and reproducible responses, but are irreversible. Br-PADAP/XAD-4 is proposed as a suitable reagent phase for use in a multi-metal ion sensor. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:368 / 376
页数:9
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