Manganese ores and concentrates -- Determination of total iron content -- Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method
This standard was last reviewed and confirmed* in 2016.
Method A is applicable to products having a total iron content from 1 to 25 % (m/m), and method B is applicable to products having a total iron content from 0.2 to 2 % (m/m). ISO 7990 should be read in conjunction with ISO 4297. Specifies principle, reactions (method A only), reagents, apparatus, sampling and samples, procedure and expression of results.
Document published on: 1985-12 Edition: 1 (Monolingual) ICS: 73.060.20 Status: Published Stage: 90.93 (2016-02-23) TC/SC: ISO/TC 132 Number of Pages: 6
Revises: ISO/R 313:1963
No corrigenda or amendments available