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由于地质试样中金、铂、钯的含量往往甚微,大都需预富集后再行测定。本文在文献[1]的基础上,拟定了泡沫塑料(下称泡塑)动态吸附后,以石墨炉原子吸收法测定硫脲洗脱液中微量金、钼、钯的方法。金、铂、钯的实测绝对灵敏度分别为12.1pg/1％吸收、260pg/1％吸收和12.5pg/1％吸收,检出限分别为1.2×10~(-4)/T、2.7×10~(-3)g/T和1.2×10~(-4)g/T,定量测定下限分别为2.6×10~(-4)g/T、5.5×10~(-3)g/T和2.5×10~(-4)g/T,可测定地质试样中0.0x g/T以上的金、铂、钯。
Due to geological samples of gold, platinum, palladium content is often very small, most of the need to pre-enrichment and then measured. Based on the literature [1], a method for the determination of trace gold, molybdenum and palladium in thiourea eluent by graphite furnace atomic absorption spectrometry after the dynamic adsorption of foam plastic (hereinafter referred to as foam plastic) was proposed in this paper. The measured absolute sensitivities of gold, platinum and palladium were 12.1pg / 1%, 260pg / 1% and 12.5pg / 1%, respectively. The detection limits were 1.2 × 10 -4 / T and 2.7 × 10 ~ (-3) g / T and 1.2 × 10 ~ (-4) g / T respectively, and the lower limit of quantification was 2.6 × 10 -4 g / T and 5.5 × 10 -3 g / T respectively 2.5 × 10 ~ (-4) g / T, the determination of geological samples 0.0xg / T of gold, platinum, palladium.