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

Autor: Takahiro Ichise, Shouta M.M. Nakayama, Collins Nimako, Yoshinori Ikenaka, Kazutoshi Fujioka, Kumiko Taira, Anri Hirai, Osei Akoto, Mayumi Ishizuka
Jazyk: angličtina
Rok vydání: 2021
Předmět:
MDIgt
maximum daily intakes of NEOs via consumption of green tea leaves
Health
Toxicology and Mutagenesis
NEO
neonicotinoid insecticide
Toxicology
complex mixtures
Acetamiprid
Dinotefuran
Conventional tea leaves
chemistry.chemical_compound
Imidacloprid
RA1190-1270
Neonicotinoid insecticide
LOQs
Limits of quantitation
Organic tea leaves
ComputingMethodologies_COMPUTERGRAPHICS
Nitenpyram
MRM
multiple-reaction monitoring
ADI
acceptable daily intake
LOD
limit of detection
Df
detection frequency
Neonicotinoid
Clothianidin
food and beverages
Regular Article
JAS
Japanese Agricultural Standards
MRLs
minimum residual levels
Thiacloprid
Horticulture
chemistry
MAFF
Ministry of Agriculture
Forestry and Fisheries of Japan
t1⁄2
half-life
Toxicology. Poisons
LC-ESI/MS/MS
Liquid chromatography-mass spectrometry/mass spectrometry
Thiamethoxam
Zdroj: Toxicology Reports, Vol 8, Iss, Pp 1657-1664 (2021)
Toxicology Reports
ISSN: 2214-7500
Popis: Graphical abstract
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 %) ≈ clothianidin (69.90 %) > dm-acetamiprid (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.
Databáze: OpenAIRE
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