Study on Low Temperature Sample Introduction of Gaseous Metal PMBP Chelates in ETV-ICP-AES
WU Ying-liang, HU Bin, PENG Tian-you, CHEN Shi-zhong, JIANG Zu-cheng * (Department of Chemistry, Wuhan University, Wuhan, 430072)
Using the reagent of 1-phenyl-3-methyl-4-benzoylpyrazolone (PMBP) as a chemical modifier, a new technique of low temperature sample introduction of gaseous metal PMBP chelates in ETV-ICP-AES was proposed and applied for the determination of trace elements in this work. The factors of affecting the formation of metal PMBP chelates and their vaporization behavior were investigated in detail. Under the optimized conditions, the detection limits for lanthanum, europium, aluminum and iron were 8.0 ng/mL, 0.9 ng/mL, 0.6 ng/mL and 3.2 ng/mL, respectively, and the corresponding relative standard deviations were 3.3%, 3.4%, 4.7% and 3.9%, respectively. The proposed method was applied to the determination of trace analytes in standard reference materials of vehicle exhaust particulate and rice flour. The results well agreed with the certified values.