摘要
以聚苯胺修饰的石墨管电极为基体电极，管内涂渍以硅钨酸为活性物质的聚氯乙烯（ＰＶＣ）膜，构成双膜流通式尼古丁电极，建立了流动注射电位法测定尼古丁的新方法，探讨了实验的最佳条件，用磷酸二氢钠－磷酸氢二钠缓冲溶液合并１．０×１０－５ｍｏｌ·Ｌ－１的尼古丁标准溶液作载液，对１．０×１０－４～１．０×１０－１ｍｏｌ·Ｌ－１的尼古丁溶液有良好线性响应，相关系数０．９９８５。本方法简便、选择性好，进样频率８０次·ｈ－１，适合大批量样品的快速测定，可用于检测烟草中的尼古丁。
The potentiometric determination of nicotine in tobacco with a flow through electrode by flow injection analysis was studied. The electrode is made of modified polyaniline, tubular graphite electrode and polyvinyl chloride sensitive membrane, with silicotungstic acid as the electroactive material. The linear response range is 10 -4 ～10 -1 mol/L of nicotine and the frequency is 80 sample per hour. The proposed method is rapid, simple and covenient and it has been applied successfully to determine nicotine in tobacco.
出处
《化学世界》
CAS
CSCD
1999年第1期43-47,共5页
Chemical World
关键词
流动注射分析
电位法
尼古丁
烟草
测定
flow injection analysis potentiometry flow through electrode nicotine tobacco
