本文提出铁锰土矿中金的氯水浸取条件及原子吸收测定方法。其要点:将矿样于600℃焙烧两小时后,准确加入50—100毫升饱和氯水,振荡浸取两小时,吸取部份清液,以甲基异丁基酮萃取金,有机相直接喷雾。有机相中金的原子吸收灵敏度为0.14微克/毫升/1%,对含金约20克/吨的试样进行测定结果,相对标准偏差在2.1%以下。 In this paper, the extraction conditions and atomic absorption spectrometry of gold in ferromanganese ore are proposed. The key points: the ore samples were calcined at 600 ℃ for two hours, accurately add 50-100 ml of saturated chlorine water, shaken leaching for two hours, to draw part of the supernatant, with methyl isobutyl ketone extraction gold, the organic phase direct spray . The atomic absorption sensitivity of gold in the organic phase was 0.14 μg / ml / 1%, and the relative standard deviation was 2.1% or less for a sample containing about 20 g / t gold.