Norm

ISO 622:1981 en

Solid mineral fuels - Determination of phorphorus content - Reduced molybdophosphate photometric method

  • Deze norm is ingetrokken sinds 22-11-2016

31,57

Over deze norm

Status Ingetrokken
Aantal pagina's 4
Commissie Vaste Minerale Brandstoffen
Gepubliceerd op 01-08-1981
Taal Engels
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.

Details

ICS-code 75.160.10
Nederlandse titel Solid mineral fuels - Determination of phorphorus content - Reduced molybdophosphate photometric method
Engelse titel Solid mineral fuels - Determination of phorphorus content - Reduced molybdophosphate photometric method
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