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无需离线的化学前处理而直接进样,热解汞齐化后在波长253.65 nm处用冷原子吸收光谱法进行汞的测定。对取样量、样品测定方式及背景值控制、仪器分析条件的选择等进行了探讨。方法的线性范围为0.1~600 ng,检出限为0.000 7μg/g。将该方法用于两个参考矿产样中汞的测定,结果与参考值相符,相对标准偏差(n=7)分别为3.3%和1.1%;用本方法、消解后利用冷原子吸收光谱法和电感耦合等离子体原子发射光谱法对铜精矿、锰矿、锌矿等含汞矿样进行测试比较,方法间无显著性差异。测定一个样品仅需5 min,样品用量少,适合批量样品的测试。
Without off-line chemical pretreatment and direct injection, pyrolytic amalgam at a wavelength of 253.65 nm by cold atomic absorption spectrometry mercury determination. The amount of sampling, sample determination methods and background value control, instrument analysis conditions were discussed. The linear range of the method was 0.1-600 ng with a detection limit of 0.000 7 μg / g. The method was applied to the determination of mercury in two reference mineral samples. The results were in good agreement with the reference values and the relative standard deviations (n = 7) were 3.3% and 1.1%, respectively. Using this method, Inductively coupled plasma atomic emission spectrometry for copper concentrate, manganese ore, zinc ore and other mercury-containing ore samples were tested and compared, there was no significant difference between the methods. Measuring a sample takes only 5 min, the sample dosage is small, suitable for bulk sample testing.