Determination of sulfurous acid in liquids and an apparatus therefor
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United States of America Patent
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Nov 19, 1985
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N/A
app pub date -
Jul 6, 1983
filing date -
Jul 9, 1982
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Expired
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Abstract
A method and an apparatus providing a simple and speedy determination of a slight amount of sulfurous acid contained in liquids by means of pH meters, based on the Modified Rankine's method in principle, and wherein the pH of a first sample of liquid is determined before and after adding an amount of hydrogen peroxide thereto, the pH of a second sample of liquid is determined before and after adding an amount of an acid or lower pH buffer solution thereto, and the concentration of sulfurous acid in the liquid is calculated from the measured pH values and an equation derived from the functional relationship: c=f(.DELTA.pH.sub.A, .DELTA.pH.sub.B) wherein c is the concentration of sulfurous acid.
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