乙酸乙酯萃取-氢化物发生-原子荧光光谱法测定金锭中锑和铋

摘要

1 引 言铋和锑是金锭中的主要杂质元素,依据国家金锭标准[1],铋和锑是必检项目.测试铋和锑的国家标准方法[2]不可同时测定,且检出限太高,对于高纯金锭无法做到精确测定.氢化物发生-原子荧光光谱法具有灵敏度高、检出限低、仪器相对便宜的优点,已广泛应用于冶金、地质和生物样品分析[3,4].本研究采用乙酸乙酯萃取-氢化物发生-原子荧光光谱法同时测定金锭中锑和铋的含量,检出限低,完全满足高纯金锭中铋和锑的含量分析.采用本方法对本公司高纯金锭样品进行加标回收实验,其结果与国家标准方法吻合.%A method was proposed for the simultaneous determination of antimony and bismuth in gold ingots by ethyl acetate extraction-hydride generation-atom fluorescence spectrometry. The detection limit of the method for bismuth and antimony was 0. 13 and 0. 012 mg/kg, respectively, the recovery rate was 92% - 97% and the relative standard deviations were below 1. 2%. The results indicated that the method is accurate with low detection limit. The analytical results were quite consistent with those by national standards method.