Abstract：The elimination of matrix interference was a difficulty in determination of trace lead in iron ore by graphite furnace atomic absorption spectrometry (GFAAS). The standard solution series of lead were added into certified reference material solution of iron ore to prepare standard addition calibration curve. Then, the established standard addition calibration curve was used for determination of lead in other iron ore samples to eliminate the matrix interference. On the basis of this, a determination method of trace lead in iron ore sample was established by GFAAS combined with standard addition calibration method. The experimental conditions were optimized as follows: the ashing program was 35 ℃ keeping for 30 s and 600 ℃ keeping for 12 s; the atomization temperature was 1 600 ℃and kept for 4 s. The results showed that the correlation coefficient of standard addition calibration curve was 0.999 8. The detection limit of method was 0.43 mg/kg. The proposed method was applied to the determination of lead in certified reference material of iron ore. The results were consistent with the certified values. The relative standard deviation (RSD, n=6) was less than 7.0%. The recovery tests of certified reference material and actual sample of iron ore were conducted according to the experimental method. The recoveries were between 93% and 98%.
程晓娟. 石墨炉原子吸收光谱法测定铁矿石中痕量铅[J]. 冶金分析, 2016, 36(12): 50-54.
CHENG Xiao-juan. Determination of trace lead in iron ore by graphite furnace atomic absorption spectrometry. , 2016, 36(12): 50-54.
亢德华,于媛君,王铁,等.电感耦合等离子体质谱法测定铸铁中镁、锡、镧、铈、锑和铅[J].冶金分析,2011,31(6):54-57.KANG De-hua,YU Yuan-jun,WANG Tie,et al.Determination of magnesium,stannum,lanthanum,cerium,antimony and lead in cast iron by inductively coupled plasma mass spectrometry[J].Metallurgical Analysis,2011,31(6):54-57.
[4]
曾泽,刘永梅,赵景红,等.石墨炉原子吸收光谱法测定滑石中酸溶痕量铅镉[J].冶金分析,2008,28(6):66-68.ZENG Ze,LIU Yong-mei,ZHAO Jing-hong,et al.Determination of trace amounts of acid soluble lead and cadmium in talc by graphite furnace atomic absorption spectrometry[J].Metallurgical Analysis,2008,28(6):66-68.
[5]
李奋,吴文启,谢晓雁,等.离子交换分离石墨炉原子吸收光谱法测定高纯铟中痕量铅[J].冶金分析,2013,33 (12):19-23.LI Fen,WU Wen-qi,XIE Xiao-yan,et al.Determination of trace lead in high purity indium by graphite furnace atomic absorption spectrometry after ion-exchange separation[J].Metallurgical Analysis,2013,33 (12):19-23.
[6]
林立,姚继军,杨仁康,等.悬浮进样-石墨炉原子吸收光谱法直接测定化妆品中的铅[J].岩矿测试,2013,32(4):644-648.LIN Li,YAO Ji-jun,YANG Ren-kang,et al.Direct determination of Pb in cosmetics by graphite furnace atomic absorption spectrometry with suspension sampling[J].Rock and Mineral Analysis,2013,32(4):644-648.
[7]
宋国辉,宋彦辉,范晓华.土壤中铅的测定方法研究[J].中国卫生工程学,2013,12(2):160-163. SONG Guo-hui,SONG Yan-jun,FAN Xiao-hua.Determination of lead in soil[J].Chinese Journal of Public Health Engineering,2013,12(2):160-163.
[8]
杨小丽,王迪民,汤志勇.石墨炉原子吸收光谱法测定磷矿石中微量铅和铬[J].岩矿测试,2010,29(1):51-54.YANG Xiao-li,WANG Di-min,TANG Zhi-yong,et al.Determination of micro-amount of lead and chromium in phosphate ores by graphite furnace atomic absorption spectrometry[J].Rock and Mineral Analysis,2010,29(1):51-54.
[9]
曾泽,卢琪,谢琰,等.石墨炉原子吸收光谱法测定磷酸中铅镉[J ].冶金分析,2009,29(5):66-68.ZENG Ze,LU Qi,XIE Yan,et al.Determination of lead and cadmium in phosphoric acid by graphite furnace atomic absorption spectrometry[J].Metallurgical Analysis,2009,29(5):66-68.
[10]
曾泽,刘永梅,赵景红,等.石墨炉原子吸收光谱法测定滑石中酸溶痕量铅镉[J].冶金分析,2008,28(6):66-68.ZENG Ze,LIU Yong-mei,ZHAO Jing-hong,et al.Determination of trace amounts of acid soluble lead and cadmium in talc by graphite furnace atomic absorption spectrometry[J].Metallurgical Analysis,2008,28(6):66-68.
[11]
徐文军.微波消解石墨炉原子吸收光谱法测定蔬菜中痕量铅[J].理化检验:化学分册,2007,43(6):485-487.XU Wen-jun.GF-AAS determination of traces of lead in vegetables with micro-wave assisted sample digestion[J].Physical Testing and Chemical Analysis Part B:Chemical Analysis,2007,43(6):485-487.
[12]
方从权,褚敬东,李春,等.石墨炉原子吸收光谱法测定茶叶中的铅[J].分析试验室,2007,26(11):112-114.FANG Cong-quan,CHU Jing-dong,LI Chun,et al.Determination of lead in tea by graphite furnace atomic absorption spectrometry[J].Chinese Journal of Analysis Laboratory,2007,26(11):112-114.
