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<p>ISO 18191:2015 specifies a spectrophotometric determination of the pH<sub>t</sub> of sea water on the total hydrogen ion concentration pH scale using the indicator dye <i>m</i>-cresol purple. The total hydrogen ion concentration, [H<sup>+</sup>]<sub>t</sub>, is expressed as moles per kilogram of sea water. The method is suitable for assaying oceanic levels of pH<sub>t</sub> 7,4 to 8,2 for normal sea water of practical salinity ranging from 20 to 40.</p>
Reģistrācijas numurs (WIID)
61730
Darbības sfēra
<p>ISO 18191:2015 specifies a spectrophotometric determination of the pH<sub>t</sub> of sea water on the total hydrogen ion concentration pH scale using the indicator dye <i>m</i>-cresol purple. The total hydrogen ion concentration, [H<sup>+</sup>]<sub>t</sub>, is expressed as moles per kilogram of sea water. The method is suitable for assaying oceanic levels of pH<sub>t</sub> 7,4 to 8,2 for normal sea water of practical salinity ranging from 20 to 40.</p>
