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ISO 622:2016
M00005016
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ISO 622:2016 Solid mineral fuels - Determination of phosphorus content - Reduced molybdophosphate photometric method
standard by International Organization for Standardization, 11/15/2016
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ISO 622:2016 specifies a reduced molybdophosphate photometric method for the determination of the total phosphorus content of hard coal, lignites and coke. Two methods for taking the phosphorus into solution are specified, namely extraction from the coal or coke ash with acid or by repeated oxidation of the coal or coke, by acid, to remove carbonaceous matter.