A fluorimetric method for the determination of chlorine and tetrachloroethene by bleaching of rhodamine B

Reinhard Niessner, Martin Båcker

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2 Scopus citations

Abstract

A new fluorimetric method for the determination of tetrachloroethene and chlorine is based on the irreversible bleaching of Rhodamine B, which is either immobilized in a silicone polymer, or collected on a filter from an aerosol. Tetrachloroethene is decomposed to produce small amounts of chlorine, which reduces the fluorescence of Rhodamine B. With the immobilized Rhodamine B the detection limits were 2.1 mg/m1 for chlorine in air, and for C2Cl4 3.5 mg/m3 and 2.3 mg/l. in the gas and liquid phase respectively. A Rhodamine B aerosol was used as a trace catcher. This aerosol was mixed with the trace gas, irradiated, and collected on a membrane filter and its fluorescence intensity was measured. The detection limits by this approach were estimated to be 6 μg/m3 for Cl2 and 55 μg/m3 for C2Cl4.

Original languageEnglish
Pages (from-to)1161-1164
Number of pages4
JournalTalanta
Volume36
Issue number12
DOIs
StatePublished - Dec 1989
Externally publishedYes

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