Fruits, vegetables and derived products — Determination of total sulphur dioxide content
NORM herausgegeben am 1.9.1981
Bezeichnung normen: ISO 5522:1981
Ausgabedatum normen: 1.9.1981
Zahl der Seiten: 7
Gewicht ca.: 21 g (0.05 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: 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.