OS GSO ISO 7990:2017
ISO 7990:1985
Omani Standard
Current Edition
·
Approved on
03 October 2017
Manganese ores and concentrates -- Determination of total iron content -- Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method
OS GSO ISO 7990:2017 Files
English
6 Pages
Current Edition
Reference Language
20.57 OMR
OS GSO ISO 7990:2017 Scope
This International Standard specifies two methods for the determination of the total iron content of manganese ores and concentrates :
method A : titrimetric method after reduction, applicable to products having a total iron content from 1 to 25 % (m/m);
method B : sulfosalicylic acid spectrophotometric method, applicable to products having a total iron content from 0,2 to 2 % (m/m).
It should be read in conjunction with ISO 4297.
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