摘要：

建立了连续光源石墨炉原子吸收光谱仪测定污泥消解样品中铍含量的方法。研究表明，以HNO₃-H₂O₂-HF-HClO₃为微波消解体系，Pd（NO₃）₂+Mg（NO₃）₂为基体改进剂，在灰化温度Ⅱ为1 200℃，原子化温度为2 400℃，积分像素点为5时，污泥中K、Ca、Na、Mg、Fe、Mn、Cu、Al、Ba、Pb、Cd、Cr、Zn、Ni和V等共存金属元素对铍的测定不产生干扰，方法检出限可达到0.02 mg/kg。采用该方法对3个污泥样品进行测定，相对标准偏差为2.7%~5.1%，加标回收率为86.0%~94.0%。

关键词: 连续光源, 铍, 污泥, 石墨炉原子吸收光谱法, 基体改进剂

Abstract:

A method was established to determine Beryllium in sludge digestion samples by graphite furnace atomic absorption spectrometer with continuous light source. The results showed that using HNO₃-H₂O₂-HF-HClO₃ as microwave digestion system, Pd(NO₃)₂+Mg(NO₃)₂ as matrix modifier, the ashing temperature Ⅱ 1 200℃, the atomization temperature 2 400℃, the integral pixel 5, the co-existing metal elements K, Ca, Na, Mg, Fe, Mn, Cu, Al, Ba, Pb, Cd, Cr, Zn, Ni and V of sludge had no interference. The detection limit of Beryllium in sludge was up to 0.02 mg/kg. Taking this method to determine three sludge samples, the RSD of which was 2.7%-5.1%, and the recovery rate was 86.0%-94.0%.

Key words: continuous light source, Beryllium, sludge, graphite furnace atomic absorption spectrometer, matrix modifier

中图分类号: 

• O657.31

• S151.93