Projet de travail approuvé
ISO/AWI 7252
Pigments and extenders — Determination of the total mercury content — Flameless atomic absorption spectrometric method
Numéro de référence
ISO/AWI 7252
Edition 2
Projet de travail approuvé
ISO/AWI 7252
95677
Un groupe de travail a préparé un projet.
Remplacera ISO 7252:1984

Résumé

The reference method described is applicable to products having total mercury contents in the range of about 0.01 % (m/m) to 0.5 % (m/m). May also be extended to products with a total content of more than 0.5 % (m/m). The principle of the method consists in the combustion of the test portion with oxygen in an enclosed system. Reduction of the mercury(II) compounds contained in the resulting solution to elementary mercury. Entrainment of the metal in a gas stream at ambient temperature and determination as the monoatomic vapour by cold vapour atomic absorption spectrometry at a wavelength in the region of 253.7 nm.

Informations générales

  •  : Projet
    : Nouveau projet enregistré au programme de travail du TC/SC [20.00]
  •  : 2
  • ISO/TC 256
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