ISO 9438:1993
Metallurgical-grade fluorspar — Determination of total phosphorus content — Reduced-molybdophosphate spectrometric method
The principle of the method specified is to decompose a test portion by alkaline fusion and subsequent dissolution of the melt in excess of nitric acid, precipitation of iron(III) phosphate with ammonia solution, dissolution of the precipitate in nitric acid, formation of the molybdophosphate complex and extraction, followed by selective reduction of the complex to molybdenum blue, spectrometric measurement of the absorbance of the coloured complex at the wavelength of maximum absorption (about 710 nm). Applies to products having total phosphorus contents, expressed as PO4^3-, in the range 0,01 % (m/m) to 1,0 % (m/m).
| Get this standard | Prices exclude GST | |
|---|---|---|
| PDF ( Single user document) |
$118.26 NZD
|
|
| Networkable PDF |
Price varies
|
Keep me up-to-date
Register to receive notifications when updates are made to this standard.
Related Information
Similar Standards
-
BS EN ISO 10058-1:2008
Chemical analysis of magnesite and dolomite refractory products (alternative to the X-ray fluorescence method), Apparatus, reagents, dissolution and determination of gravimetric silica
-
BS EN ISO 10058-2:2008
Chemical analysis of magnesite and dolomite refractory products (alternative to the X-ray fluorescence method), Wet chemical analysis
-
BS EN ISO 10058-3:2008
Chemical analysis of magnesite and dolomite refractory products (alternative to the X-ray fluorescence method), Flame atomic absorption spectrophotometry (FAAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES)
-
ISO 10058-1:2008
Chemical analysis of magnesite and dolomite refractory products (alternative to the X-ray fluorescence method) — Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica