The Propylthiouracil Carbendazim Residue Detection Research, Tobacco And Soil

In this paper, we established a method for the first time, to determine thealbendazole residues in tobacco and soil. The samples were cleaned byUltrasound-assisted solvent leaching, liquid-liquid extraction and Florisilchromatographic column and detected by HPLC. At the same time, two years' fieldexperiment on residual analysis of 18% albendazoleomoroxydine hydrochloridewettable powder on tobacco was carried out in Anshun of Guizhou province andChangsha of Hunan province. And we conducted a research on the final residues andthe degradation of albendazole in soil and tobacco. The results of the experiment haveestablished the accuracy and sensitivity of the residual analysis, which could also fullfill the requirement of the guideline on pesticide residues trials. The method offers areference for the albendazole residue analysis on other crops. After spraying the 18%albendazole·moroxydine hydrochloride wettable power on tobacco, the degradationdynamic data of albendazole were fitted by the first order kinetics equation, and theresults showed good correlation. The half-life of albendazole was found to be 4.4-6.5days in soil and 2.1-5.7 days in tobacco. The final residual quantities of albendazolewere below 0.020 mg/kg in soil and 0.979 mg/kg in tobacco, which were all wellbelow the academic MRL 6.77×10~4 mg/kg as calculated by the formula. So 18%albendazole·moroxydine hydrochloride wettable power sprayed on tobacco in thedose of 270-405 g.a.i/ha appears to be safe enough. Also, it has no pollution to thesoil.