ISO 18191:2015

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

Publication date: Sep 1, 2015

General information

Current stage: 90.93 Effective date: Dec 16, 2020

Originator: ISO

Owner: ISO/TC 147/SC 2

Type: International Standard

ICS: 13.060.50

Languages: English

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Status: Published

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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
90.93 Standard confirmed
Dec 16, 2020

National adoptions

SLNS/ISO 18191:2015

SLBS

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

60.60 Standard published

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