热解齐化-原子吸收光谱法测定红土镍矿中汞含量

经过条件试验，建立了热解齐化-原子吸收光谱法直接测定红土镍矿中汞含量的方法。样品中汞含量在57～1752μg／kg，重复测定的相对标准偏差（RSD）在1．6％～5．3％（n=11），回收率在92．79％～94．77％，与冷原子吸收光谱法的方法间相对偏差为5．18％～11．93％。方法准确、快速、样品用量少、无试剂污染，适合于批量样品的测试，有应用和推广价值。

Determination of Mercury in Laterite Nickel Ores by Pyrolysis Atomic Absorption Spectrometry with Gold Amalgamation

A method was established for direct determination of mercury in laterite nickel ores by pyrolysis atomic absorption spectrometry with gold amalgamation. The experimental results indicated that the concentrations of mercury in the samples were in a range of 57 - 1 752 μg/kg with the relative standard deviation （RSD） in a range of 1. 6%-5.3%（n=11）. The recovery of mercury was in the range of 92.79% 94.77%. The deviation between this method and the cold vapor generation-atomic absorption spectrometry method was 5.18% - 11.93%. The results suggested that this method was accurate and rapids and has the advantage of small sample consumption and no reagent contamination. Thus, this method is suitable for batch analysis and worth for widespread application.