A stable and sensitive electrochemiluminescence (ECL) detection protocol of o-aminophenol was developed, which was based on CdSe quantum dots (QDs) and the cavity structure of β-cyclodextrin. In this experiment, the working electrode was prepared by PAMAM and CdSe QD and β-cyclodextrin using layer self-assembly method under the infrared lamp. Under the optimum conditions, a good linear relationship with the concentration of o-aminophenol from 1.0 × 10-7 mol•L-1 to 8.0 × 10-6 mol•L-1 and the detection limits as low as 2.3 × 10-8 mol•L-1 (3σ) were achieved. Good selectivity and repeatability are advantages of the sensor which is feasible.

Chao Li, Kun Zhang, Fang Liu, Ling Xing and Jun Wan