论文部分内容阅读
有机溶剂萃取无焰原子吸收法测定微量金的报导较多。由于溶剂在石墨管内有扩散和渗透作用,引起信号的表观损失和分裂峰;为此有人改用离子交换和汞齐富集。本文选用了二巯基苯骈噻唑-醋酸丁酯为萃取剂,同时改进了注样操作方式,从而克服了上述缺点。本法灵敏度为2.2×10~(-11)g/1％。测定20ng金的变动系数为2.46％。回收率96.5～105％。本法灵敏、快速,能满足地质要求。
Organic solvent extraction flame atomic absorption spectrometry determination of trace gold more. Due to the diffusion and permeation of the solvent within the graphite tube, an apparent loss of signal and cleavage peaks are caused; for this reason, some switch to ion exchange and amalgamation. In this paper, two mercaptobenzothiazole - butyl acetate as extractant, while improving the injection mode of operation, thus overcoming the above shortcomings. The sensitivity of this method is 2.2 × 10 ~ (-11) g / 1%. The coefficient of variation of 20 ng of gold was 2.46%. Recovery rate of 96.5 ~ 105%. The law is sensitive and fast, can meet the geological requirements.