Numéro de référence
ISO 9779:1993
ISO 9779:1993
© ISO 2024
ISO 9779:1993
Spaths fluor utilisables dans l'industrie métallurgique — Dosage du plomb — Méthode par spectrométrie d'absorption atomique après extraction
Edition 2
1993-04
1993-04
Annulée
Résumé
The principle of the method specified is to decompose a test portion by a mixture of nitric, hydrofluoric and perchloric acids, dissolving the salts in hydrochloric acid after evaporation to dryness, extracting the lead from a dilute hydrochloric acid solution of the decomposed test portion into a solution of tri-n-octylphosphine oxide in 4-methyl-2-pentanone, aspirating the extract into the air/acetylene flame of an atomic absorption spectrometer, and measuring the absorbance at 283,3 nm. Applies to products having lead contents in the range 0,0006 % (m/m) to 0,01 % (m/m).
Cycle de vie
-
Précédemment
AnnuléeISO 9779:1990
-
Actuellement