Apparatus for measuring free and total sulfurous acid and method of measurement
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United States of America Patent
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Jan 31, 1995
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N/A
app pub date -
Oct 4, 1991
filing date -
Oct 5, 1990
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Expired
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Abstract
The present invention provides a method for measuring the amount of free sulfurous acid and bound sulfurous acid in a sample using a bacterium belonging to Thiobacillus thiooxidans or Thiobacillus ferrooxidans of in which the sample is treated with acid and/or alkali to give free sulfurous acid alone in the sample. Then, the total amount of free sulfurous acid in the sample is measured by an oxidation reaction of free sulfurous acid to sulfuric acid using a bacterium belonging to Thiobacillus thiooxidans or Thiobacillus ferrooxidans.
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