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本文研究在盐酸(40％)、氢溴酸(8％)和碘化钾(0.15％)介质中,在抗坏血酸存在下(抑制铁干扰),用甲基异丁基酮(MIBK)萃取样液中的金、银、镓、铟、铊和碲,然后加入环己烷,将上述六种元素反萃取到硫脲液(4.5％)中,用火焰原子吸收光谱法在水相中测定。各元素测定精密度为4.1～6.7％,回收率为92～111％,适用于岩石、土壤等地质样品中六个元素的同时测定。
In this paper, we investigated the effect of MIBK extraction in the presence of ascorbic acid (inhibition of iron interference) in hydrochloric acid (40%), hydrobromic acid (8%) and potassium iodide (0.15% Gold, silver, gallium, indium, thallium and tellurium, then cyclohexane was added, and the above six elements were back-extracted into the thiourea solution (4.5%) and determined by flame atomic absorption spectrometry in the aqueous phase. The precision of determination of each element is 4.1 ~ 6.7% and the recovery rate is 92 ~ 111%. It is suitable for the simultaneous determination of six elements in geological samples such as rock and soil.