ISO 5522:1981

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Fruits, vegetables and derived products -- Determination of total sulphur dioxide content

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ISO 5522:1981

Fruits, vegetables and derived products -- Determination of total sulphur dioxide content

PUBLISH DATE 1981
ISO 5522:1981

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.

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