90.93 Standard confirmed Oct 23, 2024
ISO
ISO/TC 256 Pigments, dyestuffs and extenders
International Standard
87.040 Paints and varnishes
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.
PUBLISHED
ISO 7252:1984
90.93
Standard confirmed
Oct 23, 2024