Објављен
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.
ОБЈАВЉЕН
ISO 5522:1981
90.93
Одлука о потврђивању стандарда
13. 1. 2022.
НАПУШТЕН
ISO/DIS 5522
Voće, povrće i proizvodi koji potiču od voća i povrća - Određivanje sadržaja ukupnog sumpor-dioksida
90.93 Одлука о потврђивању стандарда