Evidence map›Paper›PMID 34584850›Full record

ArticleToxicology reports2021

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

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

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Toxicology reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Collins NimakoLaboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan.
Anri HiraiLaboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan.
Takahiro IchiseLaboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan.
Osei AkotoChemistry Department, Kwame Nkrumah University of Science and Technology, Ghana.
Shouta M M NakayamaLaboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan.
Kumiko TairaDepartment of Anesthesiology, Tokyo Women's Medical University Center East, Tokyo, Japan.
Kazutoshi FujiokaPharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, United States.
Mayumi IshizukaLaboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan.
Yoshinori IkenakaLaboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

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.

Indexed as

ADI, acceptable daily intakeConventional tea leavesDf, detection frequencyJAS, Japanese Agricultural StandardsLC-ESI/MS/MS, Liquid chromatography-mass spectrometry/mass spectrometryLOD, limit of detectionLOQs, Limits of quantitationMAFF, Ministry of Agriculture, Forestry and Fisheries of JapanMDIgt, maximum daily intakes of NEOs via consumption of green tea leavesMRLs, minimum residual levelsMRM, multiple-reaction monitoringNEO, neonicotinoid insecticideNeonicotinoid insecticideOrganic tea leavest1⁄2, half-life

Identifiers

PMID34584850
PMCPMC8456056

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.