Electrochemical Construction of Vertical Single-Walled Carbon Nanotubes Array as Clenbuterol Sensor / 分析化学

ABSTRACT

Vertical single-walled carbon nanotubes (v-SWCNTs) array was constructed on glassy carbon electrode (GCE) by electrochemical method of electro-cyclic voltammetry (CV method).The synthesized electrode was very stable and was not easy to fall off.Via the amino groups of ethylenediamine (Ethylenediamine,EDA) and the carboxyl group of carboxylated carbon nanotubes,the SWCNTs were ordered to grow steadily on GCE(v-SWCNTs/EDA/GCE).The modified electrode was used to detect hydrochloric acid clenbuterol (CLE).The experimental results showed that the regular link of carbon nanotubes on GCE improved its utilization efficiency.The detection sensitivity of clenbuterol was 16.1 times higher than that of the bare GCE.Due to electron accelerating effect and nanometer effect of SWCNTs,the carboxyl peak current of SWCNTs was increased with the added CLE.The carboxyl peak current of SWCNTs had a good linear relationship with CLE concentration in the range of 10-120 ng/mL.The method was successfully applied to the determination of CLE in real urine samples with good recoveries.Also v-SWCNTs/EDA/GCE could be used as a new highly sensitive electrochemical sensor for CLE detection.