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将金精矿粉样品直接置于石英舟中,在高纯氧气氛中燃烧,释放出汞,与齐化管中的金形成金汞齐,于900℃加热释放出汞蒸汽,用直接测汞仪法测定汞的含量。测定结果的相对标准偏差为0.28%～1.57%(n=6),方法检出限为1.0μg/kg,加标回收率为95.7%～117.4%。用该法对4种土壤标准样品进行了测定,测定结果与标准值相符。该方法适合于金精矿粉中微量汞的测定。
Gold concentrate powder samples directly placed in a quartz boat, burning in a high purity oxygen atmosphere, the release of mercury, and the formation of gold in the amalgam of gold amalgam at 900 ℃ heated mercury release mercury vapor, with direct mercury Instrumental determination of mercury content. The relative standard deviations (RSDs) were 0.28% ~ 1.57% (n = 6). The detection limit was 1.0μg / kg. The recoveries were 95.7% ~ 117.4%. Four soil samples were measured by this method, and the results were consistent with the standard values. The method is suitable for the determination of trace mercury in gold concentrate powder.