GB 6901.3-2004 Translated English of Chinese Standard. GB6901.3-2004: Directives for standardization - Part 1: The structure and drafting of standardshttps://www.chinesestandard.net, 9 sept. 2014 - 9 pages This part specifies the hydrofluoric acid gravimetric method to determine silicon dioxide. This part applies to the determination of silicon dioxide in silica refractories. Measuring range (mass fraction) is greater than 95.00%. |