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

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

01-09-2015

Publisher

International Organization for Standardization

ISO 18191:2015 specifies a spectrophotometric determination of the pH_t 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 pH_t 7,4 to 8,2 for normal sea water of practical salinity ranging from 20 to 40.

Committee	ISO/TC 147/SC 2
DevelopmentNote	Supersedes ISO/DIS 18191. (09/2015)
DocumentType	Standard
Pages	11
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
BS ISO 18191:2015	Identical

ISO 22719:2008	Water quality Determination of total alkalinity in sea water using high precision potentiometric titration
ISO 5667-1:2006	Water quality Sampling Part 1: Guidance on the design of sampling programmes and sampling techniques
ISO 10523:2008	Water quality — Determination of pH