ISO/WD 25942

Water quality- determination of soluble silica in water

General information

Current stage: 20.60 Close of comment period Mar 6, 2026

Originator: ISO

Owner: ISO/TC 147/SC 2 Physical, chemical and biochemical methods

Type: International Standard

Scope

This standard specifies the method for detection of silica in water and wastewater.
This colorimetric method determines molybdatereactive silica. It is applicable to most waters, though some may require filtration and dilution to remove interferences from colour and turbidity. This method is useful for concentrations as low as 20 μg/l.

Life cycle

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ISO/WD 25942
20.60 Close of comment period
Mar 6, 2026