| For tea plant of cangnan county, since the ancient times for the main economic crops of cangnan tea. However, being influenced by science and technology level and production restrictions, except for a small amount of the cangnan tea planting organic tea garden outside, the tea tree of pest management is still cannot leave the chemical pesticides. The use of chemical pesticide to prevent disease, insect, grass harm, for high yield and good quality of the tea plays an important role, but bring pesticide environmental pollution, tea negative effects such as the pesticide residues.This study aims to establish a kind of cangnan used more for the main pesticide residue detection of technology for the production of cangnan of several major tea varieties were monitoring, at the same time for garden soil of cangnan of pesticide residues baseline survey on, for better promotion of green ecological concept to provide theoretical and experimental plant material.This study first through the full market survey, the knowledge of cangnan tea garden more commonly used for organochlorine pesticides pesticide. Followed by a variety of organochlorine pesticides in cangnan tea more residues of targeted research method. By Gas Chromatography, Gas Chromatography, GC) built on the residual organochlorine pesticides tea more testing.25kinds of chlorine pesticide in tea of the labeled recovery are between70%～115%, which is5.0loq ug/kg. Through the experiment, with the tea garden soil and the organic chlorine pesticide can I also testing research. Followed by a garden soil eight kinds of cangnan of chlorine pesticide residue detection method of the more pertinent research. By gas chromatography method to establish the garden soil, in about666of chlorine pesticide DDT residues of more. The tea garden soil8kinds of chlorine pesticide is prevented.the recovery are in the range of85%102%. In order to understand the chlorine pesticide residues in cangnan tea present situation, the study of2009years in cangnan three although the two major tea varieties of random54of tea and54of garden soil in the sample organochlorine pesticides, based on previous the methods for the tests, and during the next two years to the time tracked inspection. And the soil of the three chlorine pesticide residues in though reduced year by year, but still higher total. The results show that the method is convenient and accurate, and apply to the organic chlorine pesticide in tea more residues. The main residues of162tea for gamma-irradiation HCH, o, p’the DDT and p, p’the DDD; Suitable for garden soil organic chlorine in the determination of pesticide residues. |
