
Manganese ores and concentrates - Determination of total iron content - Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method
出版:International Organization for Standardization

专家解读视频
PN ISO 7990:1994 - Identical
NFA 22 402:1979 - Similar
NF ISO 7990:1986 - Identical
JIS M 8234:2004 - Identical
KS E ISO 7990:2002 - Identical