Historical
ISO 5379:1983
Starches and derived products -- Determination of sulfur dioxide content -- Acidimetric method and nephelometric method
Entrainment in a current of nitrogen of the gas extracted from the acidified and heated product, and fixing and oxidation of the gas by bubbling through a dilute solution of neutral hydrogen peroxid. Titration of the sulphuric acid formed with standard volumetric sodium hydroxide solution of nephelometric determination in the case of low contents.
International Organization for Standardization [iso]