title: Nano-TiO₂ modified carbon paste sensor for electrochemical nicotine detection using anionic surfactant.
abstract: A newly competitive electrochemical sensor for nicotine (NIC) detection was successfully achieved. Nano-TiO2 with a carbon paste electrode (CPE) were used for the sensor construction, where Nano-TiO2 was considered as one of the richest and highly variable class of materials. The sensor showed electrocatalytic activity in both aqueous and micellar media toward the oxidation of NIC at Britton-Robinson (B-R) buffer solution (4×10(-2)M) of pH range (2.0-8.0) containing (1.0mM) sodium dodecylsulfate (SDS) using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. Scanning electron microscope (SEM) and Energy Dispersive X-Ray Analysis (EDX) techniques were also used. The linear range of detection for NIC using the new Nano-TiO2 Modified Carbon Paste sensor (NTMCP) was detected using diffrential pulse voltammetry (DPV) technique and it was found between 2×10(-6)M and 5.4×10(-4)M with a detection limit of 1.34×10(-8)M. The obtained results clarified the simplicity, high sensitivity and selectivity of the new NTMCPE for nicotine determination in real cigarettes and urine samples.
authors.affiliation: Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt. Electronic address: Mohammed.shehata9011@yahoo.com.
authors.forename: M
authors.initials: M
authors.lastname: Shehata
authors.affiliation: Pharmaceutical Chemistry Dept., National Organization for Drug Control and Research [NODCAR], 6 Abu Hazem Street, Pyramids Ave. 29, Giza, Egypt.
authors.forename: S M
authors.initials: SM
authors.lastname: Azab
authors.affiliation: Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt.
authors.forename: A M
authors.initials: AM
authors.lastname: Fekry
authors.affiliation: Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt.
authors.forename: M A
authors.initials: MA
authors.lastname: Ameer
mesh_terms: D002244:Carbon / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000295:instrumentation; D004566:Electrodes; D006801:Humans; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009538:Nicotine / Q000032:analysis* / Q000652:urine*; D013501:Surface-Active Agents / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*; D062789:Tobacco Products / Q000032:analysis*
chemical_list: D013501:Surface-Active Agents; C009495:titanium dioxide; D009538:Nicotine; D002244:Carbon; D014025:Titanium
keywords: Cyclic voltammetry; Nano-TiO(2); Nicotine; Scanning electron microscope