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ISO 18191:2015

Water quality — Determination of pHt in sea water — Method using the indicator dye m-cresol purple ISO 18191:2015

General information

90.92 Standard to be revised   Apr 22, 2023

ISO

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

International Standard

13.060.50   Examination of water for chemical substances

Scope

ISO 18191:2015 specifies a spectrophotometric determination of the pHt of sea water on the total hydrogen ion concentration pH scale using the indicator dye m-cresol purple. The total hydrogen ion concentration, [H+]t, is expressed as moles per kilogram of sea water. The method is suitable for assaying oceanic levels of pHt 7,4 to 8,2 for normal sea water of practical salinity ranging from 20 to 40.

Life cycle

NOW

PUBLISHED
ISO 18191:2015
90.92 Standard to be revised
Apr 22, 2023

REVISED BY

IN_DEVELOPMENT
ISO/AWI 18191