Numéro de référence
ISO 6678:1981
ISO 6678:1981
© ISO 2024
ISO 6678:1981
Acide phosphorique à usage industriel — Dosage du plomb — Méthode par spectrométrie d'absorption atomique
Edition 1
1981-10
1981-10
Annulée
Résumé
The lead is extracted from a diluted test portion into a solution of diethylammonium diethyldithiocarbamate in xylene. The xylene extract is separated and aspirated into the acetylene/air flame of an atomic absorption spectrometer. The spectrometric measurements are carried out at a wavelength of about 217 nm or, alternatively, about 283 nm. The method is applicable to phosphoric acids having lead contents greater than 0.1 mg/kg.