Aluminium oxide primarily used for the production of aluminium -- Determination of phosphorus content -- Reduced phosphomolybdate spectrophotometric method
This International Standard specifies a spectrophotometric method using reduced ammonium phosphomolybdate for the determination of the phosphorus content of aluminium oxide primarily used for the production of aluminium. The method is applicable to phosphorus contents, expressed as P2O5, greater than 0,000 5 %.