Reference number
ISO 3705:1976
ISO 3705:1976
© ISO 2025
International Standard
ISO 3705:1976
Sulphur for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
Edition 1
1976-09
1976-09
ISO 3705:1976
9180
Published
(Edition 1, 1976)
This publication was last reviewed and confirmed in 2019.
Therefore this version remains current.
Abstract
Applicable to products having As contents equal or more than 0.5 mg/kg. In a well-ventilated cupboard, dissolution of a test portion in carbon tetrachloride. Oxidation of sulphur by bromine and nitric acid. Heating in a boiling water bath to eliminate the exess of bromine, carbon tetrachloride and nitric acid. The analysis is carried out according to ISO 2590. The replacement of some reagents shall be noted.