Reference number
ISO 7252:1984
ISO 7252:1984
© ISO 2024
International Standard
ISO 7252:1984
Paints and varnishes — Determination of total mercury — Flameless atomic absorption spectrometric method
Edition 1
1984-11
1984-11
ISO 7252:1984
13906
Publicado
(Edición 1, 1984)
Esta publicación se revisó y confirmó por última vez en 2024.
Por lo tanto, esta versión es la actual.
Resumen
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.
Informaciones generales
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Estado: PublicadoFecha de publicación: 1984-11Etapa: Norma Internacional confirmada [90.93]
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Edición: 1Número de páginas: 6
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Comité Técnico :ISO/TC 256ICS :87.040
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