This standard specifies the determination method of silicon content in industrial circulating cooling water, boiler water and natural water. The spectrophotometric method in this standard is applicable to the determination of the soluble silicon content in industrial circulating cooling water of 0.1 mg/L to 5 mg/L; Determination of silicon content of 0 ~ 50ug / L; gravimetric method is suitable for the determination of silicon content > 5 mg / L in industrial circulating cooling water and natural water; hydrofluoric acid conversion spectrophotometry is suitable for natural water with a total silicon content of 0.5 mg / L Determination of L ~ 5 mg/L.
GB/T 12149-2007 Referenced Document
GB/T 602 Chemical reagent--Preparations of standard solutions for impurity
GB/T 6682 Water for analytical laboratory use.Specification and test methods*, 2008-05-15 Update
GB/T 12149-2007 history
2017GB/T 12149-2017 Determination of silica in water for industrial circulating cooling system and boiler
2007GB/T 12149-2007 Water for industrial circulating cooling system and boiler.Dermination of silica
1989GB/T 12149-1989 Analysis of water used in boiler and cooling system--Determination of silica--Molybdenum blue colorimetry
GB/T 12149-2007 Water for industrial circulating cooling system and boiler.Dermination of silica has been changed from GB/T 12150-1989 Analysis of water used in boiler and cooling system--Determination of silica--Photometric method by silica-molybdenum blue.
GB/T 12149-2007 Water for industrial circulating cooling system and boiler.Dermination of silica has been changed from GB/T 14417-1993 Analysis of water used in boiler and cooling system. Determination of total silica.
GB/T 12149-2007 Water for industrial circulating cooling system and boiler.Dermination of silica has been changed from GB/T 16633-1996 Industrial circulating cooling water--Determination of silica--Spectrophotometric method.