Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leaves
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...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2018-01-01
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| Series: | Toxicology Reports |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214750018300647 |
| _version_ | 1811231053667368960 |
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| author | Yoshinori Ikenaka Kazutoshi Fujioka Tomonori Kawakami Takahiro Ichise Nesta Bortey-Sam Shouta M.M. Nakayama Hazuki Mizukawa Kumiko Taira Keisuke Takahashi Keisuke Kato Koji Arizono Mayumi Ishizuka |
| author_facet | Yoshinori Ikenaka Kazutoshi Fujioka Tomonori Kawakami Takahiro Ichise Nesta Bortey-Sam Shouta M.M. Nakayama Hazuki Mizukawa Kumiko Taira Keisuke Takahashi Keisuke Kato Koji Arizono Mayumi Ishizuka |
| author_sort | Yoshinori Ikenaka |
| collection | DOAJ |
| description | 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. Keywords: Neonicotinoid, Tea, Japan, Sri Lanka, Dinotefuran |
| first_indexed | 2024-04-12T10:38:35Z |
| format | Article |
| id | doaj.art-dc49e6ac3c02435f8cbfa1dd60501e68 |
| institution | Directory Open Access Journal |
| issn | 2214-7500 |
| language | English |
| last_indexed | 2024-04-12T10:38:35Z |
| publishDate | 2018-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Toxicology Reports |
| spelling | doaj.art-dc49e6ac3c02435f8cbfa1dd60501e682022-12-22T03:36:39ZengElsevierToxicology Reports2214-75002018-01-015744749Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leavesYoshinori Ikenaka0Kazutoshi Fujioka1Tomonori Kawakami2Takahiro Ichise3Nesta Bortey-Sam4Shouta M.M. Nakayama5Hazuki Mizukawa6Kumiko Taira7Keisuke Takahashi8Keisuke Kato9Koji Arizono10Mayumi Ishizuka11Laboratory of Toxicology, Department of Environmental Veterinary Science, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita ku, Sapporo, 060-0818, Japan; Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa; Corresponding author at: Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, N18, W9, Kita-ku, Sapporo, 060-0818, Japan.Albany College of Pharmacy and Health Sciences, 106 New Scotland Ave, Albany, NY, USAToyama Prefectural University, Imizu, Toyama, JapanLaboratory of Toxicology, Department of Environmental Veterinary Science, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita ku, Sapporo, 060-0818, JapanLaboratory of Toxicology, Department of Environmental Veterinary Science, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita ku, Sapporo, 060-0818, JapanLaboratory of Toxicology, Department of Environmental Veterinary Science, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita ku, Sapporo, 060-0818, JapanDepartment of Environmental Veterinary Science, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, JapanDepartment of Anaesthesiology, Tokyo Women’s Medical University, Medical Center East, Tokyo, JapanFaculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba, 274-8510, JapanFaculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba, 274-8510, JapanFaculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto, JapanLaboratory of Toxicology, Department of Environmental Veterinary Science, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita ku, Sapporo, 060-0818, JapanTea 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. Keywords: Neonicotinoid, Tea, Japan, Sri Lanka, Dinotefuranhttp://www.sciencedirect.com/science/article/pii/S2214750018300647 |
| spellingShingle | Yoshinori Ikenaka Kazutoshi Fujioka Tomonori Kawakami Takahiro Ichise Nesta Bortey-Sam Shouta M.M. Nakayama Hazuki Mizukawa Kumiko Taira Keisuke Takahashi Keisuke Kato Koji Arizono Mayumi Ishizuka Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leaves Toxicology Reports |
| title | Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leaves |
| title_full | Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leaves |
| title_fullStr | Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leaves |
| title_full_unstemmed | Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leaves |
| title_short | Contamination by neonicotinoid insecticides and their metabolites in Sri Lankan black tea leaves and Japanese green tea leaves |
| title_sort | contamination by neonicotinoid insecticides and their metabolites in sri lankan black tea leaves and japanese green tea leaves |
| url | http://www.sciencedirect.com/science/article/pii/S2214750018300647 |
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