Standard

ISO 18191:2026

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

Corrigenda and amendments are bought separately.

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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.

Document information

  • Standard from ISO
  • Published:
  • Edition: 2
  • Version: 1
  • Document type: IS
  • ICS 13.060.50
  • ISO TC ISO/TC 147/SC 2

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