Dissipation of carbofuran and carbaryl on Oolong tea during tea bushes, manufacturing and roasting processes
Resource
Journal of Environmental Science and Health, Part B 42 (6): 669-675
Journal
Journal of Environmental Science and Health Part B
Pages
669-675
Date Issued
2007
Date
2007
Author(s)
Abstract
Carbofuran (2,3-dihydro-2,2-dimethyl-7-benzofuranol-N-methylcarbamate) and carbaryl (1-naphthyl-N-methylcarbamate) are insecticides widely used in tea plantations. The objective of the present study was to evaluate the dissipation of carbofuran and carbaryl during the growth periods of Oolong tea, processing and roasting. Analysis of the residual insecticides was carried out using high-pressure liquid chromatography with a post-column fluorescence detector. Results showed that in the tea field carbofuran dissipated faster then carbaryl. Manufacturing processes of Oolong tea further reduced the carbofuran and carbaryl contents. The persistence of carbofuran and carbaryl was decreased with increasing roasting temperature. From the results, we conclude that the presence of carbofuran and carbaryl in tea can be reduced by proper field management, manufacturing and roasting processes. Copyright © Taylor & Francis Group, LLC.
Type
journal article
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