Admittometric Electrochemical Determination of Atrazine by Nano-composite immune-biosensor using FFT-Square wave Voltammetry

作者：Norouzi P^*; Larijani B; Ganjali M R; Faridbod F

来源：International Journal of Electrochemical Science, 2012, 7(11): 10414-10426.

DOI：10.1016/s1452-3981(23)16873-8

• FFT square wave voltammetry
• atrazine
• gold nanoparticles
• ionic liquid
• multi-walled carbon nanotube

A novel atrazine electrochemical measurement system was developed based on antibody combine with Au nanoparticles, Multi walled carbon nanotube and ionic liquid on glassy carbon electrode surface. Coulometric fast Fourier transformation square wave voltammetry was used for the electrochemical measurements. In this method, the admittance response of the electrode was integrated in a selected potential range to calculate amount of transferred charge during the adsorption of atrazine. Analytical parameters such as pH, SW frequency, amplitude and deposition time of Au were also studied. The linear concentrations range of atrazine was from 0.5-100 nM with a detection limit of 0.02 nM. Moreover, the proposed sensor exhibited good accuracy, low response time, which was less than 9 s, high sensitivity with repeatability (R.S.D value of 3.7%) and long term stability, 40 days with a decrease of 8.9% in response.

• 出版日期2012-11