International Standard
ISO 3431:1976
Sodium fluoride primarily used for the production of aluminium — Determination of soluble sulphates content — Turbidimetric method
Reference number
ISO 3431:1976
ISO 3431:1976
Edition 1
1976-07
1976-07
© ISO 2024
International Standard
p
ISO 3431:1976
8747
Published
(Edition 1, 1976)
This standard was last reviewed and confirmed in 2022.
Therefore this version remains current.
Abstract
Applicable to products having SO4 contents of more than 0.05 % (m/m). Covers the dissolution of the test portion in hydrochloric acid and evaporation in hydrochloric acid solution for drying. Dissolution of the residue in a hydrochloric acid solution. Measurement of the turbidity obtained by precipitation, under specified conditions, of barium sulphate using a spectrophotometer at a wavelength of about 470 nm or a photoelectric absorptiometer.
General information
-
Status: PublishedPublication date: 1976-07Stage: International Standard confirmed [90.93]
-
Edition: 1Number of pages: 3
-
Technical Committee :ISO/TC 226ICS :71.100.10
- RSS updates
Life cycle
Got a question?
Check out our FAQs
Customer care
+41 22 749 08 88
Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)