通过形成钼硅酸、还原为钼蓝和分光光度法测量反应性二氧化硅。适用于高达50æg的SiO$d2，在高达100 ml的总二氧化硅中，通过与反应性二氧化硅熔融。适用于50毫升悬浮二氧化硅中50æg SiO$d2的过滤和熔融。适用于高达50æg的SiO$d2，最多1升。交叉引用:BS 2690:第100部分

Reactive silica by formation of molybdosilicic acid, reduction to molybdenum blue and spectrophotometric measurement. Applicable to up to 50 æg of SiO$d2 in up to 100 ml. Total silica by prior fusion to reactive silica. Applicable to up to 50 æg of SiO$d2 in up to 50 ml. Suspended silica by prior filtration and fusion. Applicable to up to 50 æg of SiO$d2 in up to 1 L.Cross References:BS 2690:Part 100