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Norm
ISO 622:1981
Ausgabedatum: 1981 08 01
Solid mineral fuels — Determination of phorphorus content — Reduced molybdophosphate photometric method
For taking the phosphorus into solution the following two methods are specified: The carbonaceous material is removed by ashing in amuffle furnace under specified conditi...
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ZURÜCKGEZOGEN
: 2016 11 18
Herausgeber:
International Organization for Standardization
Format:
Digital | 4 Seiten
Sprache:
Englisch
Aktuell Gültig:
ICS
For taking the phosphorus into solution the following two methods are specified: The carbonaceous material is removed by ashing in amuffle furnace under specified conditions and the phosphorus is extracted by treatment with hydrofluoric and sulphuric acids. The carbonaceous material is removed by repeated oxidation with nitric acid in the presence of sulphuric acid. The determination is carried out by adding ammonium molybdate and ascorbic acid solution and measuring the absorbance of the resulting blue solution by a siutable optical instrument.
ISO 622:2016
2016 11 18
Solid mineral fuels — Determination of phosphorus content — Reduced molybdophosphate photometric met...
Norm
ISO 622:1981
1981 08 01
Solid mineral fuels — Determination of phorphorus content — Reduced molybdophosphate photometric met...
Norm
↖
Norm
ISO 622:2016
Ausgabedatum :
2016 11 18
Solid mineral fuels — Determination of phosphorus content — Reduced molybdophosphate photometric method