二阶导数光谱峰面积法测定中草药中微量锗  

Second Derivative Spectrophotometry for the Determination of Trace Germanium Ⅳ in Chinese Herbs

作　　者：李红玫[1] 卢利军[2] 辛红[1] 

机构地区：[1]长春师范学院化学系,长春130032 [2]吉林出入境检验检疫局,长春130062

出　　处：《分析化学》2002年第12期1504-1506,共3页Chinese Journal of Analytical Chemistry

摘　　要：在Ge 苯基荧光酮 (PF) 氯化十六烷基吡啶 (CPC)三元络合物的显色体系中 ,引入二阶导数光谱峰面积技术 ,对锗的显色体系及测定方法进行了研究。该方法有效地消除了W 、Sn 、Mo 、V 、Ti 和Fe(Ⅲ )等离子的干扰 ,提高了准确度和选择性。线性范围为 0～ 1 5mg L,检出限为 3 .3 μg L ,εGe为 1 .4× 1 0 5L·mol- 1 ·cm- 1 。用于中药材中Ge 的测定 ,标准加入试验的回收率为 1 0 1 .0 %～ 1 1 2 .0 %。A new spectrophotometric method for the determination of germanium? in Chinese herbs was established by measuring the second derivative peak area of germanium-phenylfluorone-cetylpyridinium chloride complex. The interference of W?, Sn?, Mo?, V?, Ti?, Fe? can be eliminated effectively. The linear range of the determination is 0～15 mg/L. The detection limit of the method is 3.3 μg/L. ε Ge is 1.4×10 5 L·mol -1 ·cm -1 . The method has been applied to the determination of germanium? in Chinese herbs. The recovery of standard addition is 101%～112%.

关 键 词：峰面积 测定 锗 苯基荧光酮 二阶导数光谱 中药材 氯化十六烷基吡啶 微量分析 

分 类 号：O657.3[理学—分析化学]