標準號：ISO 7252-1984
中文標準名稱：色漆和清漆 汞總含量的測定 無焰原子吸收光譜法
英文標準名稱：Paints and varnishes; Determination of total mercury; Flameless atomic absorption spectrometric method
標準類型：G50
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G50
國際標準分類號：87.040
適用范圍：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.