A Sulphur Dioxide-Selective Sensing Membrane Based on Fluorescence Quenching

Abstract

Abstract: Anew reversible optical sensing membrane for the determination of sulphur dioxide based on fluorescence quenching of anthracene dissolved in plasticized poly(vinylchloride) has been developed.This chemical recognition process is accompanied by a change in the fluorescence spectrum of anthracene.With the optimum sensing membrane described, sulphur dioxide in sample solution from 6.59×10^-3 mol/Lto 5.23×10^-1 mol/Lcan be determined.The calibration curve for sulphur dioxide shows a good correlation with the theoretically derived formulae and thus confirms the theoretically expected behavior.Besides a high reproducibility of the optical signals, the very short response time between 5 to 30 s was realized.The optical sensing membrane presented exhibits a good selectivity for sulphur dioxide.

Key words: Fluorescence quenching, Sulphur dioxide, Optical chemical sensing membrane

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ZENG Hui-Hui, WANG Ke-Min, QIN Zhen, YU Ru-Qin . A Sulphur Dioxide-Selective Sensing Membrane Based on Fluorescence Quenching[J]. Chem. J. Chinese Universities, 1993, 14(2): 180.

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A Sulphur Dioxide-Selective Sensing Membrane Based on Fluorescence Quenching

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