GSO ISO 7990:2017由GSO 发布于 2017-10-03。
GSO ISO 7990:2017在国际标准分类中归属于: 73.060.20 锰矿。
GSO ISO 7990:2017 的最新版本是哪一版?
最新版本是 GSO ISO 7990:2017 。
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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