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ISO 5521:1981
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ISO 5521:1981 Fruits, vegetables and derived products -- Qualitative method for the detection of sulphur dioxide
standard by International Organization for Standardization, 08/01/1981
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Full Description
The method is applicable to products having contents of 2 mg or more per kilogram. It consists in acidification of a test portion and decolourizing by the liberated gas of a starch indicator paper previously coloured blue by a trace of iodine vapour.