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ISO 18191:2015

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

Sep 1, 2015

General information

90.92     Apr 22, 2023

ISO

ISO/TC 147/SC 2

International Standard

13.060.50  

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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

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

REVISED BY

IN_DEVELOPMENT
ISO/DIS 18191