Norm

ISO 9388:1992 en

Nickel alloys - Determination of phosphorus content - Molybdenum blue molecular absorption spectrometric method

31,57

Over deze norm

Status Definitief
Aantal pagina's 6
Commissie Metalen algemeen
Gepubliceerd op 27-08-1992
Taal Engels
Phosphorus content can be determined in the range of 0,001 % (m/m) to 0,025 % (m/m). Cr(III) and silica cause interference which is eliminated. The principle is dissolution of a test portion in a mixture of nitric and hydrochloric acids, fuming with sulfuric acid, oxidation of Cr(III) to Cr(VI), precipitation of Fe(III) phosphate and redissolution of the precipitate, addition of boric, tartaric and sulfamic acids, formation and extraction of molybdophosphoric acid, reduction of the heteropoly acid to molybdenum blue and back-extraction into an aqueous phase, measurement of the absorbance of the aqueous solution at 700 nm.

Details

ICS-code 77.120.40
Nederlandse titel Nickel alloys - Determination of phosphorus content - Molybdenum blue molecular absorption spectrometric method
Engelse titel Nickel alloys - Determination of phosphorus content - Molybdenum blue molecular absorption spectrometric method

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