Tebuconazole (Teb), (RS)-1-p-chlorophenyl-4,4-dimethyl-3-(1H-1,2,4-triazol-1-ylmethyl)- pentan-3- ol) is usually used as a triazolic fungicide. It is used to treat pathogenic fungi on plant in agriculture and on crops like barley, wheat, and peanuts. Teb possess a relatively high soil organic carbon-water binding coefficient and a half-life in soil of 49 – 610 days under aerobic circumstances [1]. The structure of Teb was presented in Fig. 1. Fig. 1. The structure of Tebuconazole. So far, various analytical methods including gas chromatography [2], liquid chromatography [3] and electrochemistry [1] have been developed for determination of Teb. In this work, a quick precipitation method was used for synthesis of CeO2 nanoparticles (NPs). The synthesized CeO2 NPs were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that CeO2 NPs increase the intensity of the luminol-O2 CL reaction. In addition, it was found that Teb quench the CeO2 NPs-luminol-O2 CL reaction and CL intensity was inversely proportional to the concentration of Teb. For finding the reaction condition on which the Teb has highest influence on the CL system, the parameters affecting on the CL system was optimized. Under optimum condition, the calibration curve for Teb was drawn. The linear range, limit of detection and relative standard deviation (RSD%) of the CL method were 7.0 × 10-6 – 2.0 × 10-4, 1.6 × 10-6 , 3.42%, respectively. In order to investigate the selectivity of the CL method towards the Teb, the interference study was also carried out. The CL method was successfully used for the determination of concentration of Teb in environmental water samples.
