Determination of eighteen metal elements in petroleum coke by inductively coupled plasma mass spectrometry
ZHOU Xue-zhong1, XIE Hua-lin*2, LI Tan-ping1, NIE Xi-du1
1. College of Material and Chemical Engineering, Hunan Institute of Technology, Hengyang 421002, China; 2. College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, China
Abstract：The sample was treated by microwave digestion technique with HNO3 as solvent.A method for simultaneous determination of trace metal elements (Li, Na, Mg, Al, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd, Sb and Pb) in petroleum coke by inductively coupled plasma mass spectrometry (ICP-MS) was established. The results indicated that the influence of ultra pure water and HNO3(φ=2.5%) blank solution was negligible. The collsion reaction cell (CRC) was used by introducing helium (flow rate: 5.2 mL/min) and hydrogen (flow rate: 5.8 mL/min) to eliminate the interference of polyatomic ions. The analytical accuracy was further improved by on-line addition of internal standard elements (45Sc, 72Ge, 89Y, 115In and 209Bi). The linear relationship was good, and the correlation coefficient was no less than 0.999 7. The detection limits were in the range of 11.2-216.7 ng/L, the recoveries of standard addition were in the range of 91%-110% and the RSD were 1.5%-4.1%. The method was applied to 3 batches of petroleum coke, and the results were in accordance with those obtained by ICP-AES.
周学忠，谢华林，李坦平，聂西度. 电感耦合等离子体质谱法测定石油焦中18种金属元素[J]. 冶金分析, 2015, 35(4): 8-12.
ZHOU Xue-zhong, XIE Hua-lin, LI Tan-ping, NIE Xi-du. Determination of eighteen metal elements in petroleum coke by inductively coupled plasma mass spectrometry. , 2015, 35(4): 8-12.
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