prBAS ISO 18191:2027
Water quality — Determination of pHT in seawater — Method using the indicator dye m-cresol purple
General information
Status:Project
Number of pages:17
Adoption method:Korice
Language:engleski
Edition:2.
Realization date:06.11.2026
Forseen date for next stage code:16.11.2026
Technical committee:BAS/TC 7, Environment
ICS:
13.060.50, Examination of water for chemical substances
Abstract
This document specifies a spectrophotometric determination of the pHT of seawater on the total hydrogen ion concentration pH scale. The total hydrogen ion concentration, [H+]T, is expressed as moles per kilogram of seawater. The method is suitable for assaying oceanic levels of pHT from 7,4 to 8,2 for normal seawater of practical salinity ranging from 20 to 40.
Lifecycle
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Original document and degree of correspondence
ISO 18191:2026, identical
Relation to BAS standards
Work material
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