MWCNT modified carbon paste electrode for sensitive determination of nicotine

ABSTRACT

A new sensor for the determination of nicotine is proposed based on the reduction of Cu(II)–nicotine complex at MWCNT modified carbon paste electrode. In borate buffer (pH 7.0) the reduction peak of Cu(II)–nicotine complex was observed at − 0.05 V (versus Ag/AgCl). The increment of peak current obtained by deducting the reduction peak current of the Cu(II)–nicotine complex was rectilinear with nicotine concentration in the range of 0.05–30.0 n g mL⁻¹, with a detection limit of 0.01 ng/mL⁻¹. The method was applied for the sensitive quantification of nicotine in real samples with the satisfactory results.

KEYWORDS:

• Blood plasma
• carbon paste electrode
• MWCNT
• nicotine