Determination of Trace Lead in Chinese Medicinal Materials by GFAAS with PdCl2 as a Matrix Modifier
QIN Fan-xin1, ZHANG Ming-shi1,2, HU Ji-wei2, HUANG Xian-fei3, ZHANG Dan4
1.Analysis and Testing Center, Guizhou Normal University, Guiyang 550001, China 2. Guizhou Provincial Key Lab of Mountainous Environment, Guiyang 550001, China 3. College of Biological Technology and Engineering, Guizhou Normal University, Guiyang 550001, China 4. College of Physics and Chemistry, Guizhou Normal University，Guiyang 550001, China
Abstract：A method for the determination of lead in Chinese medicinal materials by GFAAS with PdCl2 as a matrix modifier was established. By comparing PdCl2 with NH4H2PO4 in improving effect on the determination of Pb, the dosage of PdCl2, acidity of medium, interference of coexistent ion, recovery of the method, precision of the method, and the detection limit were checked. The programmed temperature of graphite furnace was optimized. The results show that the improving effect of PdCl2 on Pb determination is better than that of NH4H2PO4. The dosage of PdCl2 is 0.3 μg. The best medium should be 1.0% HCl. The three kinds of acids, 0.4% H2SO4, 1.0% HClO4 and 1.8% HCl, did not weaken the signal of lead. The recovery of the method is 90%-104% and the precision is ＜5.0%. The characteristic mass is 8.5 pg. The detection limit is 0.066 mg·kg-１. It is concluded that the method is simple, sensitive, accurate and credible, and can be used widely.
秦樊鑫1,张明时1,2,胡继伟2,黄先飞3,张 丹4 . 氯化钯作基体改进剂GFAAS法测定中药材中微量铅的研究[J]. 光谱学与光谱分析, 2007, 27(10): 2123-2126.
QIN Fan-xin1, ZHANG Ming-shi1,2, HU Ji-wei2, HUANG Xian-fei3, ZHANG Dan4 . Determination of Trace Lead in Chinese Medicinal Materials by GFAAS with PdCl2 as a Matrix Modifier. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(10): 2123-2126.
[1] XIONG Ji-xia(熊季霞). Information on Traditional Chinese Medicine(中医药信息)，2005，22(1)：1. [2] ZUO Yan-fu(左言富). Jiangsu Journal of Traditional Chinese Medicine(江苏中医药)，2005，26(5)：1. [3] ZHU Guo-guang(祝国光编). How Can Chinese Traditional Medicine Enter into the European Union Market(中药如何进入欧共体市场). Beijing: China Medicine Science Technology Press(北京: 中国医药科技出版社), 2000. 213. [4] The Officinal Committee of Hygiene Department in the People’s Republic of China(中华人民共和国卫生部药典委员会编). The People’s Republic of China Pharmacopoeia, 2005 Edition(One Part)(中华人民共和国药典，2005年版(一部 IX B). Beijing: Chemical Industry Press(北京: 化学工业出版社), 2005. 43. [5] WANG Li-xin, HU Xiao-rong, LI Hui(王丽鑫, 胡晓荣, 李 晖). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004，24(11)：1447. [6] QIU Hong-mei, LI Xue-hui(邱红梅, 黎雪慧). Hainan Medicine(海南医学), 2001, 12(6): 10. [7] LIANG Qi, LU Hui-wen(梁 祈, 陆惠文). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 1996，16(5)：88. [8] WANG Zhi-hua, WANG Shu-jun, HUANG Yu-li(王志华, 王书俊, 黄毓礼). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2001，21(6)：854. [9] CAO Hui-jun, GUO Meng-jing(曹惠君, 郭蒙京). Chinese Journal of Health Laboratory Technology(中国卫生检验杂志), 2005, 15(4): 447. [10] LIANG Hong-jie, LIANG Chun-sui, HU Shu-guang(粱红洁, 梁春穗, 胡曙光). Chinese Journal of Health Laboratory Technology(中国卫生检验杂志), 2003, 13(4): 418. [11] SUN Han-wen, WEN Xiao-hua, LIANG Shu-xuan(孙汉文, 温晓华, 梁淑轩). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2006，26(5)：950. [12] XIAO Shan-mei, CHEN Jian-rong, SHEN Yu-qin(肖珊美, 陈建荣, 沈玉勤). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2006，26(5)：955. [13] SUN Han-wen(孙汉文). Atomic Absorption Spectral Analysis Technology(原子吸收光谱分析技术). Beijing：China Science Technology Press(北京: 中国科学技术出版社)，1992.211.
