Issue 3, 2001

Picric acid sensitive optode based on a fluorescence carrier covalently bound to membrane

Abstract

An acryloyl group was attached to fluorescein through the phenol hydroxyl group to make it photopolymerizable with 2-hydroxypropyl methacrylate and covalently immobilized on an optode glass surface modified with γ-(methacryloxy)propyltrimethoxysilane. The optode system with a plastic-clad fused silica bifurcated fiber optic bundle shows satisfactory analytical performance characteristics for determining picric acid in terms of selectivity and reproducibility with a linear range from 8.0 × 10−7 to 4.0 × 10−3 mol L−1. The quenching mechanism was investigated. The optode membrane can be applied to the indirect determination of cinchonine drug and the results obtained were satisfactory.

Article information

Article type
Paper
Submitted
08 Nov 2000
Accepted
08 Jan 2001
First published
15 Feb 2001

Analyst, 2001,126, 349-352

Picric acid sensitive optode based on a fluorescence carrier covalently bound to membrane

X. Yang, C. Niu, G. Shen and R. Yu, Analyst, 2001, 126, 349 DOI: 10.1039/B009002F

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