Could I help you?
New Sale! View larger

ISO 9388:1992

New product

ISO 9388:1992 Nickel alloys - Determination of phosphorus content - Molybdenum blue molecular absorption spectrometric method

standard by International Organization for Standardization, 08/01/1992

More details

$19.80

-56%

$45.00

More info

Full Description

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.

Product Details

Published: 08/01/1992 Number of Pages: 6File Size: 1 file , 610 KB Same As: BS 6783-12:1992