【摘要】 以硅钨酸为活性物质，邻苯二甲酸二辛酯为增塑剂，在ｐＨ玻璃电极表面涂敷一层对烟碱敏感的ＰＶＣ膜，构成烟碱选择性电极。在ｐＨ为５～７范围内，该电极对１０－１～１０－５ｍｏｌ／Ｌ的烟碱水溶液有良好的线性响应。以该电极作指示电极，双液接饱和甘汞电极作参比电极，用直接电位法测定了烟草和烟气粒相物中的烟碱含量，回收率在９６．８％～１０３．５％之间。该电极制作简单，选择性好，测定样品时不需将烟碱进行前分离处理，应用方便，与常用的紫外分光光度法相比，分析结果无显著性差异。更多还原

【Abstract】 A nicotine PVC membrane coated glass electrode has been prepared with silicotungstic acid being the electroactive meterial. The electrode has high sensitivity and selectivity and near Nernstian responses for 10 -1 ～10 -5 mol/L nicotine at the pH range 5～7. It has been applied to the determination of nicotine in the tobacco and smoke from different cigarettes.更多还原