ISO 7252-1984 色漆和清漆 汞总含量的测定 无焰原子吸收光谱法

标准号：ISO 7252-1984
中文标准名称：色漆和清漆 汞总含量的测定 无焰原子吸收光谱法
英文标准名称：Paints and varnishes; Determination of total mercury; Flameless atomic absorption spectrometric method
标准类型：G50
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G50
国际标准分类号：87.040
适用范围：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.