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sklademVydáno: 2015-09-30
BS ISO 18191:2015
Water quality. Determination of pH<sub>t</sub> in sea water. Method using the indicator dye <i>m</i>-cresol purple
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| Označení normy: | BS ISO 18191:2015 |
| Počet stran: | 22 |
| Vydáno: | 2015-09-30 |
| ISBN: | 978 0 580 79390 5 |
| Status: | Standard |
DESCRIPTION
BS ISO 18191:2015
This standard BS ISO 18191:2015 Water quality. Determination of pHt in sea water. Method using the indicator dye m-cresol purple is classified in these ICS categories:
- 13.060.50 Examination of water for chemical substances
This International Standard 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.