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Temporal variation analysis and risk assessment of neonicotinoid residues from tea in China
- Source :
- Environmental Pollution. 266:115119
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- The extensive use of neonicotinoids (NEOs) has caused the release of wide-ranging of residues to the environment and food, and their potential health risks are now receiving more attention. In this study, three surveys were conducted to obtain the overall profiles of NEO residue levels (seven NEOs and one metabolite) in Chinese tea over a period of seven years. A total of 726 tea samples were tested, and nearly 87% of the samples were found to have detectable NEO residues. The overall average detection frequency of acetamiprid was the highest, reaching 73%. Imidacloprid residues in 4.6% of the samples exceeded the Chinese maximum residue limits, whereas clothianidin and nitenpyram had been detected in Chinese tea samples since 2014. The applications of thiacloprid and thiamethoxam gradually increased, and some tea samples with high residue levels appeared in China. These findings signal the replacement of new and old varieties of NEOs in China. Both long- and short-term cumulative exposures to NEOs were calculated based on optimistic and pessimistic models recommended in the EFSA guidelines. In the three survey periods, the average total imidacloprid-equivalent concentrations were 484.63, 1713.36, and 1148.34 μg/kg, respectively. Combined with the refined point estimates and probabilistic models used in this study, the hazard quotients of NEO residues in tea for Chinese tea consumers were found to be low and within the bounds of safety.
- Subjects :
- China
Insecticides
010504 meteorology & atmospheric sciences
Health, Toxicology and Mutagenesis
010501 environmental sciences
Biology
Toxicology
Risk Assessment
01 natural sciences
Acetamiprid
Neonicotinoids
chemistry.chemical_compound
Chinese tea
0105 earth and related environmental sciences
Nitenpyram
Residue (complex analysis)
Tea
Neonicotinoid
Clothianidin
General Medicine
Nitro Compounds
Thiacloprid
Pollution
chemistry
Thiamethoxam
Subjects
Details
- ISSN :
- 02697491
- Volume :
- 266
- Database :
- OpenAIRE
- Journal :
- Environmental Pollution
- Accession number :
- edsair.doi.dedup.....82412bd70521550b421bd2d391632a23