Published
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.
PUBLISHED
ISO 5522:1981
90.93
Standard confirmed
Jan 13, 2022
ABANDON
ISO/DIS 5522
Fruits, vegetables and derived products — Determination of total sulphur dioxide content
60.60 Standard published
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