ISO 1690 : 1976(R2018)现行
SODIUM AND POTASSIUM SILICATES FOR INDUSTRIAL USE - DETERMINATION OF SILICA CONTENT - GRAVIMETRIC METHOD BY INSOLUBILIZATION
出版：International Organization for Standardization
专家解读视频
Describes procedure based on evaporation to dryness of a test portion previously acidified with hydrochloric acid. Dissolution of the soluble salts, filtration and washing of the insoluble matter.
NBN T 03 235 : 1980 - Identical
UNE 55625 : 1982 - Identical
PN ISO 1690 : 2000 - Identical
NBN T 03 235 : 1980 - Identical
UNE 55625 : 1982 - Identical
PN ISO 1690 : 2000 - Identical
NBN EN 1209 : 2004 - Identical
