Electrochemical determination of hydroquinone using hydrophobic ionic liquid-type carbon paste electrodes.
Three types of carbon paste electrodes (CPEs) with different liquid binders were fabricated, and their electrochemical behavior was characterized via a potassium hexacyanoferrate(II) probe. 1-Octyl-3-methylimidazolium hexafluorophosphate ionic liquid (IL) as a hydrophobic conductive pasting binder showed better electrochemical performance compared with the commonly employed binder. The IL-contained CPEs demonstrated excellent electroactivity for oxidation of hydroquinone. A diffusion control mechanism was confirmed and the diffusion coefficient (D) of 5.05 × 10-4 cm2 s-1 was obtained. The hydrophobic IL-CPE is promising for the determination of hydroquinone in terms of high sensitivity, easy operation, and good durability.
College of Chemistry & Chemical Engineering, Central South University, Changsha 410083, P, R, China. lhtxj@126.com.
Yiyi
Y
She
Yougen
Y
Tang
Hongtao
H
Liu
Ping
P
He