Neonicotinoid residues in commercial Japanese tea leaves produced by organic and conventional farming methods

Nimako, Collins; Hirai, Anri; Ichise, Takahiro; Akoto, Osei; Nakayama, Shouta M. M.; Taira, Kumiko; Fujioka, Kazutoshi; Ishizuka, Mayumi; Ikenaka, Yoshinori

Neonicotinoid residues in commercial Japanese tea leaves produced by organic and conventional farming methods

Nimako, Collins; Hirai, Anri; Ichise, Takahiro et al.

Toxicology reports, 2021, 8, 1657-1664

Permalink : https://hdl.handle.net/2115/83757

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https://doi.org/10.1016/j.toxrep.2021.09.002

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アクセス権	metadata only access
URI	https://hdl.handle.net/2115/83757
タイトル	Neonicotinoid residues in commercial Japanese tea leaves produced by organic and conventional farming methods
著者	Nimako, Collins ; Hirai, Anri ; Ichise, Takahiro ; Akoto, Osei ; Nakayama, Shouta M. M. ; Taira, Kumiko ; Fujioka, Kazutoshi ; Ishizuka, Mayumi ; Ikenaka, Yoshinori
著者名 Nimako, Collins
著者名 Hirai, Anri
著者名 Ichise, Takahiro
著者名 Akoto, Osei
e-Rad_Researcher 90647629 著者名 Nakayama, Shouta M. M.
e-Rad_Researcher 10163148 著者名 Taira, Kumiko
著者名 Fujioka, Kazutoshi
e-Rad_Researcher 50332474 著者名 Ishizuka, Mayumi
e-Rad_Researcher 40543509 著者名 Ikenaka, Yoshinori
言語	英語
キーワード	Neonicotinoid insecticide
	Conventional tea leaves
	Organic tea leaves
発行日	2021-01-01
出版者	Elsevier
収録物名	Toxicology reports
巻(号)	8
ページ	1657-1664
抄録	The current study sought to assess the residual levels of neonicotinoid insecticides (NEO) in organic and conventional green tea leaves produced in Japan. A total of 103 tea leaves (thus, 42 organic and 61 conventional), were sampled from grocery stores in Japan. Concentrations of NEOs in the tea leaves were quantified using LC-MS/MS; and the data was used to estimate maximum daily intakes of NEOs within the Japanese population. Seven native NEO compounds and one NEO metabolite were detected in both organic and conventional tea leaves. Detection frequencies (%Dfs) of NEOs in the tea samples (n = 103) were found in the decreasing order; thiacloprid (84.47 %) > dinotefuran (74.76 %) > imidacloprid (69.90 %) approximate to clothianidin (69.90 %) > dmacetamiprid (63.11 %) > thiamethoxam (58.25 %) > acetamiprid (4.85 %) > nitenpyram (1.94 %). About 94.20 % of the tea leaves contained two or more NEO compounds simultaneously. The %Dfs of NEOs were relatively lower in organic tea leaves, compared to the conventional tea leaves. Various percentile concentrations of NEOs were far lower in organic tea leaves, compared to the conventional tea leaves. The maximum daily intakes of NEOs through consumption of tea (MDIgt) were also lower for organic tea leaves, compared to the conventional tea samples.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	2214-7500
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1016/j.toxrep.2021.09.002