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Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leaves
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| Title: | Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leaves |
| Authors: | Ikenaka, Yoshinori Browse this author →KAKEN DB | | Fujioka, Kazutoshi Browse this author | | Kawakami, Tomonori Browse this author | | Ichise, Takahiro Browse this author | | Bortey-Sam, Nesta Browse this author | | Nakayama, Shouta M. M. Browse this author →KAKEN DB | | Mizukawa, Hazuki Browse this author →KAKEN DB | | Taira, Kumiko Browse this author | | Takahashi, Keisuke Browse this author | | Kato, Keisuke Browse this author | | Arizono, Koji Browse this author | | Ishizuka, Mayumi Browse this author →KAKEN DB |
| Keywords: | Neonicotinoid | | Tea | | Japan | | Sri Lanka | | Dinotefuran |
| Issue Date: | 2018 |
| Publisher: | Elsevier |
| Journal Title: | Toxicology reports |
| Volume: | 5 |
| Start Page: | 744 |
| End Page: | 749 |
| Publisher DOI: | 10.1016/j.toxrep.2018.06.008 |
| Abstract: | Tea is one of the world's most popular beverages due to health promoting effects. Despite these, there have been concerns about the adverse effects of tea contamination by neonicotinoid insecticides. Only a handful of studies on neonicotinoid insecticides in tea have been carried out and this study was therefore performed to determine the concentrations of seven neonicotinoid insecticides and 20 metabolites in Japanese green tea leaves, and black tea leaves from Sri Lanka; and assess the Maximum Daily Intake (MDI) of neonicotinoid insecticides. From the results, the seven parent compounds were detected in Japanese tea leaves and beverages. Dinotefuran (3004 ng/g) was found at the highest level in green tea leaves. Ten of the 20 metabolites were detected in Japanese tea products. Dinotefuran-urea (92%) and thiacloprid-amide (89%) were most frequently detected in Japanese tea leaves. Clothianidin-urea (100 ng/g) was found at the highest level in green tea leaves. Neonicotinoid insecticides and metabolites were not detected in Sri Lankan black tea leaves. The concentrations and MDI of neonicotinoid insecticides in tea leaves were below the Maximum Residual Levels (MRLs) and Acceptable Daily Intakes (ADIs), respectively. |
| Rights: | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/72465 |
| Appears in Collections: | 獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 池中 良徳
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