Reduction of the sulphate in a test portion to sulphide, absorption of the evolved hydrogen sulphide in acetone and sodium hydroxide solution and titration with mercury (II) acetate using dithizone as indicator.
BS 4258-3:1975
Original price was: $264.16.$132.00Current price is: $132.00.
Methods of test for phosphoric acid (orthophosphoric acid) for industrial use-Determination of sulphate content
BSI Group , 09/30/1975
