|
|||||
|
|
| 氯化钯作基体改进剂GFAAS法测定中药材中微量铅的研究 | |
| 引用本文： | 秦樊鑫,张明时,胡继伟,黄先飞,张丹.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. |
| 作者姓名： | 秦樊鑫 张明时 胡继伟 黄先飞 张丹 |
| 作者单位： | 1. 贵州师范大学分析测试中心,贵州,贵阳,550001 2. 贵州师范大学分析测试中心,贵州,贵阳,550001;贵州省山地环境保护重点实验室,贵州,贵阳,550001 3. 贵州省山地环境保护重点实验室,贵州,贵阳,550001 4. 贵州师范大学生物技术与工程学院,贵州,贵阳,550001 5. 贵州师范大学理学院,贵州,贵阳,550001 |
| 基金项目： | 贵州省中药现代化专项基金 |
| 摘 要： | 建立了氯化钯作基体改进剂,石墨炉原子吸收测定中药材中微量铅的方法.对氯化钯用量、介质酸度、共存离子干扰及方法回收率、精密度、检出限进行了考查.氯化钯作基体改进剂对铅的改进效果优于磷酸二氢铵.方法回收率为90%～104%,精密度(RSD)＜5.0%,特征质量为8.5 pg,检出限为0.066 mg·kg-1.方法简单、灵敏、准确、可靠,值得推广. |
| 关 键 词： | 氯化钯 基体改进剂 GFAAS 中药材 铅 |
| 文章编号： | 1000-0593（2007）10-2123-04 |
| 修稿时间： | 2006-06-16 |
Determination of Trace Lead in Chinese Medicinal Materials by GFAAS with PdCl2 as a Matrix Modifier |
|
| QIN Fan-xin,ZHANG Ming-shi,HU Ji-wei,HUANG Xian-fei,ZHANG Dan.Determination of Trace Lead in Chinese Medicinal Materials by GFAAS with PdCl2 as a Matrix Modifier[J].Spectroscopy and Spectral Analysis,2007,27(10):2123-2126. | |
| Authors: | QIN Fan-xin ZHANG Ming-shi HU Ji-wei HUANG Xian-fei ZHANG Dan |
| Institution: | 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 microg. 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 x kg(-1). It is concluded that the method is simple, sensitive, accurate and credible, and can be used widely. |
| Keywords: | Palladium chloride Matrix modifier GFAAS Chinese medicinal materials Lead |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |