火焰原子吸收光谱法测定高纯金锭中铜、银、铁、铅、铋、锑

Determination of Cu,Fe,Ag,Pb,Bi,and Sb in gold ingot by FAAS

提出了用火焰原子吸收光谱法测定金锭中Cu,Ag,Fe,Pb,Bi,Sb的方法。用乙酸乙脂萃取分离金,水相浓缩后测定6种待测元素,方法的检出限:Cu,Ag,Fe为0 021mg/L,Pb,Bi,Sb为0 24mg/L;回收率94%～106%;RSD小于10 6%。该方法快速、简便,样品用量少,测定结果与ICP AES法和国家标准方法一致。

The simultaneous determination of Cu,Ag,Fe,Pb,Bi and Sb in gold ingot by flame atomic absorption spectrometry(FAAS)was investigated.First aqua regia was used to dissolve the sample,then ethyl acetate was used to extract Au in order to rid of Au and water phase was concentrated for the determination.The detection limits for Cu,Ag and Fe were 0.021 mg/L and for Pb,Bi,and Sb were 0.24 mg/L.The recoveries for six elements were between 94%-106% and the relative standard deviations were less than 10.6%.In addition,the analytical results were quite consistent with those by ICP-AES.In a word, the method is accurate,rapid and convenient.