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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

Publication date:   Sep 1, 2015

95.99   Withdrawal of Standard   Jul 7, 2026

General information

95.99   Withdrawal of Standard   Jul 7, 2026

ISO

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

International Standard

13.060.50   Examination of water for chemical substances

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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

WITHDRAWN
ISO 18191:2015
95.99 Withdrawal of Standard
Jul 7, 2026

REVISED BY

PUBLISHED
ISO 18191:2026




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