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ISO 5522:1981
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ISO 5522:1981 Fruits, vegetables and derived products -- Determination of total sulphur dioxide content
standard by International Organization for Standardization, 09/01/1981
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Full Description
The method consists in acidifying and heating a test portion, entraining, in a current of nitrogen, the gas liberated, absorbing and oxidizing the gas by bubbling it through a neutral, dilute hydrogen peroxide solution, then determining the sulphuric acid thus formed using standard volumetric sodium hydroxide solution. Verification of the determination is described in the annexes A and B, respectively.