Fruits, vegetables and derived products — Determination of total sulphur dioxide content
NORMA vydaná dňa 1.9.1981
Označenie normy: ISO 5522:1981
Dátum vydania normy: 1.9.1981
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy 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.