ISO-18191 Water quality - Determination of pHt in sea water - Method using the indicator dye m-cresol purple

ISO-18191 - 1ST EDITION - CURRENT


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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.

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Document Number

ISO 18191:2015

Revision Level

1ST EDITION

Status

Current

Publication Date

Sept. 1, 2015

Committee Number

ISO/TC 147/SC 2