Direct Determination of Heavy Metal Elements in Propolis by Inductively Coupled Plasma Mass Spectrometry
ZHANG Ping1, FU Liang2, XIE Hua-lin2*
1. College of Material and Chemical Engineering, Hunan Institute of Technology, Hengyang 421002, China 2. College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China
Abstract：In current study, a method was established for simultaneous quantitative analysis of Cr, Ni, As, Cd, Sb, Sn, Hg and Pb in propolis by using inductively coupled plasma mass spectrometry. Before analyzed by ICP-MS, the propolis was diluted with n-propanol/xylene(70∶30, φ). Organic sample can remain stable by diluting with n-propanol/xylene, result from long-time sample dispersion in the solution. Carbon accumulation on the sampling cone, which comes from the high carbon content of butter, will clog the orifice and decrease analysis sensitivity. Thus a small amount of oxygen was added into the argon gas line to eliminate carbon. ORS was used to eliminate the polyatomic interferences caused by the high salty matrixes. The effects of the He collision gas flow rate on estimating detection limits of Cr, Ni and As were investigated. The matrix effects and the instrument drift have been calibrated with Rh as internal standard element. The results show that the detection limits is in the range of 20.8～102.7 ng·L-1, the recovery is in the range of 92.0%～109.0%, and the RSD is less than 3.5%. This method was simple, sensitive and precise to simultaneously analyze 8 heavy metal elements in propolis.
Key words：Inductively coupled plasma mass spectrometry;Propolis;Heavy metal elements
张 萍1，符 靓2，谢华林2* . 电感耦合等离子体质谱法直接测定蜂胶中重金属元素 [J]. 光谱学与光谱分析, 2015, 35(10): 2878-2881.
ZHANG Ping1, FU Liang2, XIE Hua-lin2* . Direct Determination of Heavy Metal Elements in Propolis by Inductively Coupled Plasma Mass Spectrometry . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(10): 2878-2881.
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