Standard Test Method for Low-Level Total Silica in High-Purity Water by Flameless Atomic Absorption Spectroscopy

Importancia y uso:

5.1 Control of silica in boiler feedwater and boiler water is necessary to minimize the formation of scale-forming silicates that decrease heat transfer in the boiler. Volatilization and carryover of silica with the steam may cause hard, glassy siliceous deposits to form on turbine blades that reduce turbine efficiency.

5.2 Colloidal silica that is not removed by boiler water pretreatment processes may be solubilized in the boiler and thus contribute to the dissolved silica concentration in the boiler. Both dissolved and total silica are of interest.

Subcomité:

D19.03

Referida por:

D4364-13R22E01, D7869-17, D7356_D7356M-19, D5127-13R18, D1193-06R18, D1193-06R18, D1193-06R18, D1193-06R18, D1193-06R18, G0090-23

Volúmen:

11.02

Número ICS:

71.060.20 (Oxides)

Palabras clave:

atomic spectroscopy; boiler water; graphite furnace; high-purity water; silica;