食品科学 ›› 2002, Vol. 23 ›› Issue (1): 97-99.

• 分析检测 • 上一篇    下一篇

尼古丁针型化学传感器的研制

 姜绍通, 杨俊, 潘丽军, 张悠金   

  1. 合肥工业大学生物与食品工程学院,中国科学技术大学
  • 出版日期:2002-01-15 发布日期:2012-02-13

Study on New Needle-type Nicotine Chemical Sensor

 JIANG  Shao-Tong, YANG  Jun, PAN  Li-Jun, ZHANG  You-Jin   

  • Online:2002-01-15 Published:2012-02-13

摘要: 研制了一种适于尼古丁小体积微量样品快速测定的针型化学传感器。以高分子材料修饰已预处理好的针灸针为基体电极,将含有活性物质硅钨酸的聚氯乙烯(PVC)敏感膜,涂渍于基体电极表面,制成尼古丁针型化学传感器。该传感器在pH4.5~7.0范围内,对5.0×10-5~1.0×10-1mol/L的尼古丁水溶液有良好的线性响应,斜率为57.1mV/dec.,检测下限为1.6×10-5mol/L,响应时间为3min。采用纳米材料SiO2掺杂PVC膜,表明纳米材料SiO2可明显缩短响应时间,提高稳定性,改善传感器的性能。

关键词: 尼古丁, 化学传感器, 纳米材料, SiO2

Abstract: The preparation of a new needle-type nicotine chemical sensor based on a needle wire modified with a polymer material was used as basis electrode. A layer of PVC membrane containing silicotungstic acid and plasticizer was coated on the surface the basis electrode.At pH4.5~7.0, this sensor showed a rapid and near-Nernstian response to nicotine cation in the concentration range of 5.0×10-5~1.0×10-1mol/L ,with a slope of 57.1 mV/dec. In this work ,it described the needle-type nicotine chemical sensor characteristics when nano-material SiO2 particles were compounded with PVC sensitive membrane.It exhibited that nano-material SiO2 particles could shorten response time and improve stability of the sensor.

Key words: Nicotine , Chemical sensor , Nano-material , SiO2