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Method for continuous quantitative detection of sulphur dioxide and an arrangement for implementing this method

  • US 4,857,472 A
  • Filed: 05/25/1988
  • Issued: 08/15/1989
  • Est. Priority Date: 05/27/1987
  • Status: Expired due to Term
First Claim
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1. A method for the continuous quantitative detection of sulphur dioxide in gaseous or liquid media, comprising the steps of bringing said medium to be analyzed into contact with a fluorescent indicator emitting fluorescence radiation upon excitation, said fluorescent indicator being selected from the group consisting of triphenylmethane dyes, and measuring the extent of fluorescence-quenching caused by sulphur dioxide contained in said gaseous or liquid media to enable a quantitative determination of the content of sulphur dioxide in said medium to be obtained.

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