Analytical Sciences

Abstract − Analytical Sciences, 19(9), 1309 (2003).

A Multi-Wall Carbon Nanotubes-Dicetyl Phosphate Electrode for the Determination of Hypoxanthine in Fish
Shaofang LÜ
Department of Chemistry, Xiaogan University, Xiaogan 432100, Hubei, China
An enzymeless sensor based on a multi-walled carbon nanotubes-dicetyl phosphate (MWCNT-DCP) film modified vitreous carbon electrode was developed for the determination of hypoxanthine. The MWCNT-DCP film modified electrode showed a remarkable enhancement effect on the oxidation peak current of hypoxanthine. Under the optimized conditions, the oxidation peak current is proportional to the concentration of hypoxanthine over the range from 5.0 x 10-7 to 2.0 x 10-4 mol L-1 with a detection limit (S/N = 3) of 2.0 x 10-7 mol L-1. The MWCNT-DCP film modified electrode has been successfully used to detect hypoxanthine in fish samples.