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Homepage>ISO Standards>ISO 11400:1992-Nickel, ferronickel and nickel alloys-Determination of phosphorus content-Phosphovanadomolybdate molecular absorption spectrometric method

ISO 11400:1992

Nickel, ferronickel and nickel alloys

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Standard´s number:	ISO 11400:1992
Pages:	5
Edition:	1
Released:	1992
Language:	English

DESCRIPTION

ISO 11400:1992

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.

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