ISO 5522:1981
$19.50
Fruits, vegetables and derived products — Determination of total sulphur dioxide content
| Published By | Publication Date | Number of Pages |
| ISO | 1981-09 | 12 |
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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