Phosphorus content can be determined in the range of 0,000 5 % (m/m) to 0,05 % (m/m). As, Cr, Hf, Nb, Si, Ta, Ti, W interfere, but the interferences can be avoided. The principle is dissolution of a test portion in a mixture of nitric and hydrochloric acids, fuming with perchloric acid, removal of chromium, complexation of silicon, conversion of phosphorus to phosphovanadomolybdic acid, extraction of this compound.

General information

  • Status :  Withdrawn
    Publication date : 1992-09
  • Edition : 1
    Number of pages : 5
  • :
    ISO/TC 155
    Nickel and nickel alloys
  • 77.100
    Nickel, chromium and their alloys

Life cycle

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