This standard specifies the determination of silicon dioxide content by silicon molybdenum blue photometry and perchloric acid dehydration gravimetric method. This standard applies to the determination of the amount of silica in limestone and dolomite, and also applies to the determination of the amount of silica in metallurgical lime. The first part is the molybdenum blue photometric method, the measurement range: the amount of silicon dioxide is 0.05% to 4.00%; the second part is the perchloric acid dehydration gravimetric method, the measurement range is: the amount of silicon dioxide is greater than 2.00%.
GB/T 3286.2-1998 history
2012GB/T 3286.2-2012 Methods for chemical analysis of limestone and dolomite.Part 2:The determination of silicon dioxide content.The silicomolybdic blue spectrophotometric method and the perchloric acid dehydration gravimetric method
1998GB/T 3286.2-1998 Methods for chemical analysis of limestone and dolomite--The determination of silicon dioxide content