首页 | 本学科首页   官方微博 | 高级检索  
     

差分脉冲阳极溶出伏安法测定中药材样品中的铜铅镉
引用本文:刘 雄,林肖湘,李 红. 差分脉冲阳极溶出伏安法测定中药材样品中的铜铅镉[J]. 广州化工, 2014, 0(6): 108-109,113
作者姓名:刘 雄  林肖湘  李 红
作者单位:韩山师范学院化学系,广东潮州521046
摘    要:用差分脉冲阳极溶出伏安法同时测定了8种中药材样品中铜、铅、镉的含量,它们的溶出电位依次是-0.15 V、-0.45 V、-0.65 V;铜、铅浓度在4.0×10-10~1.0×10-7g/mL范围内与峰电流呈线性关系,线性回归方程分别为y=378.84x(R2=0.9985)、y=661.96x(R2=0.9937)(x为浓度,单位10-6g/mL),镉浓度在4.0×10-10~8.0×10-7g/mL范围内与峰电流呈线性关系,回归方程为y=588.72x(R2=0.9963)(x为浓度,单位10-6g/mL),其检出限依次为1.0×10-11g/mL、1.8×10-11g/mL、1.0×10-11g/mL。此方法用于中草药样品中铜、铅、镉的测定,其回收率依次为88.06%、105.74%,、104.54%,方法简便,灵敏度高,结果准确可靠。

关 键 词:中药材        阳极溶出伏安法

Differential Pulse Anodic Stripping Voltammetry Determination of Copper Lead Cadmium in Traditional Chinese Medicinal Materials
LIU Xiong,LIN Xiao - xiang,LI Hong. Differential Pulse Anodic Stripping Voltammetry Determination of Copper Lead Cadmium in Traditional Chinese Medicinal Materials[J]. GuangZhou Chemical Industry and Technology, 2014, 0(6): 108-109,113
Authors:LIU Xiong  LIN Xiao - xiang  LI Hong
Affiliation:(Department of Chemistry, Hanshan Normal University, Guangdong Chaozhou 521046, China)
Abstract:Based on the best experimental conditions, the content of copper, lead and cadmium in traditional Chinese medicinal materials were determined by differential pulse anodic stripping voltammetry. It was found that the peak potential of them were found at - 0. 15 V, - 0. 45 V, - 0.65 V, respectively. The linear relationships were obtained between the peak current and concentration in the range of 4.0×10^-10 - 1.0×10^-7 g/mL for copper and lead. Their linear regression equation were y = 378.84x( R2 = 0. 9985), y = 661.96x( R2 = 0. 9937), and x was the concentration of units of 10-6 g/mL, respectively. The linear relationships were obtained between the peak current and concentration in the range of 4.0 ×10^-10 - 8.0×10^-7 g/mL for cadmium and its linear regression equation was y = 588.72x ( PtE = 0. 9963) , and x was the concentration of units of 10-6 g/mL. Their detection limits were 1.0 ×10^-11g/mL、1.8×10^-11g/mL、1.0×10^-11 g/mL and the recovery were 88.06% , 105.74% , 104. 54% , respectively. The method was simple, sensitive, accurate and reliable.
Keywords:traditional Chinese medicinal materials  copper  lead  cadmium  anodic stripping voltarnmetry
本文献已被 CNKI 维普 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号