Standard

ISO 18191:2015

Sept 2015 Historical draft

Note: This standard has a draft: ISO 18191:2026

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Abstract

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.

Document information

Standard from ISO
Published: 1 September 2015
Withdrawn: 7 July 2026
Expires: 26 September 2014
Edition: 1
Version: 1
Document type: IS
ISBN:

ICS 13.060.50
ISO TC ISO/TC 147/SC 2

Product Relations

Revised by: ISO 18191:2026
Revised by: ISO 18191:2026
Revised by: ISO 18191:2026

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Historical draft

ISO 18191:2015
Revised by

Draft

ISO 18191:2026

Draft

ISO 18191:2026

Published

ISO 18191:2026

ISO 18191:2015

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ISO 18191:2026

ISO 18191:2015

ISO 18191:2015

ISO 18191:2015

Abstract

Document information

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Extended editions Extended editions (0)

Version history Related corrigendum and amendments (0)

Version history History (4)

ISO 18191:2026

ISO 18191:2015

ISO 18191:2015

ISO 18191:2015

Abstract

Document information

Product Relations

Product life cycle