Anionic surfactant modified carbon nanoparticles paste sensor forpotentiometric nicotine detection in tobacco

Nicotine is the most important alkaloid of tobacco and its determination is very important inmedicine, toxicology, human body and tobacco industry. In this work, a simple potentiometricmethod using modified carbon nanoparticles paste sensor is described for the rapid determinationof nicotine.The formation of carbon nanoparticles was evidenced by scanning electron microscope and energydispersive X-ray analysis techniques. FTIR confirmed the successful coating of SDS on the surfaceof carbon nanoparticles. The effect of pH, response time and the composition of modified carbonpaste electrode was investigated .The proposed nicotine sensor showed a Nernstian response in thewide detection range from 1x10-3 to 5x10-7 M with a low detection limit of 1x10-7 M. The electrodedisplayed rapid response, long-time stability (more than 6 months), and high sensitivity. Moreover,the proposed nicotine sensor was also successfully applied for determination nicotine content intobacco products.

Keywords:

Carbon nanoparticles , Nicotine , Potentiometric sensor , Anionic surfactant