Determination of Fifteen Metal Elements in Cynomorium Songaricum by Flame Atomic Absorption Spectrophotometry(FAAS)
XUE Guo-qing1, LIU Qing2, REN Xue-feng1, HAN Yu-qi1
1. Department of Chemistry, Hexi University, Zhangye 734000, China 2. The 4th Geoteam of the Gansu Nonferro Geoexploration Bureau, Zhangye 734012, China
Abstract:A FAAS method was established for the determination of Na, K, Mg, Ca, Cu, Zn, Fe, Mn, Ni, Co, Pb, Cr, Cd, Ag and Au in Cynomorium Songaricum after digestion with HNO3-HClO4(φ 4∶1) at 90-95℃ and at normal pressure. In this paper, the parameters in FAAS were studied. The analytical results of Na, K, Mg, Ca, Fe, Zn, Cu, Mn, Pb, Ni and Ag were 13 572.0, 14 260.0, 358.3, 168.3, 238.5, 19.4, 5.9, 3.4, 2.6, 1.3 and 0.4 μg·g-1 respectively and Co, Cr, Cd and Au were not found in the samples. The results showed that the recovery of standard addition was 97.8%-104.5%, and the relative standard deviation (n=9) was 0.2%-5.0%. The method is fast, simple and convenient. The results were satisfactory.
Key words:FAAS;Cynomorium Songaricum;Trace element
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