Determination of five pesticides in kumquat: Dissipation behaviors, residues and their health risk assessment under field conditions

Li, Zhixia; Su, Xuesu; Dong, C.Y.; Zhou, Jie; An, Wenjin; Wang, Chengqiu

doi:10.1016/j.ecoenv.2021.112958

Cited by 13 publications

(5 citation statements)

References 43 publications

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“…Half-life (t 1/2 ) values were 4.08 and 3.54 days for grapes and 1.885 and 2.14 days for grape leaves, respectively, at the recommended and double doses. Bifenthrin half-life values were from 30 to 33 days in kumquat fruit with initial deposits of 0.145 to 0.198 mg/kg using a 10% emulsifiable concentrate (EC) formulation at 60 mg/L spray solution, and the application method was not mentioned [ 26 ]. Leaves showed a faster dissipation rate than grapes in both doses, appearing in k and t 1/2 values.…”

Section: Resultsmentioning

confidence: 99%

“…Abdel Ghani et al (2018) developed dispersive liquid-liquid micro-extraction (DLLME) in combination with GC-MS for the determination of bifenthrin in palm dates after extraction with acidified acetonitrile; the achieved validation criteria were 86-101.3%, 0.79 µg/kg, +12.27%, for recovery percentage, LOQ, and ME% [9]. LC-MS/MS was recently used to determine bifenthrin in different matrices [11,26] and revealed a strong matrix suppression effect ranging from −38.6% to −80.4%, significantly higher than our findings of −1.17% and −3.4% in grape and grape leaves, respectively. GC-MS and GC-MS/MS were more commonly used in most published research, and the LOQ value for these methods depended on the protocol used to prepare the samples.…”

Section: Lod and Loqmentioning

confidence: 99%

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Bifenthrin Residues in Table Grapevine: Method Optimization, Dissipation and Removal of Residues in Grapes and Grape Leaves

Alhewairini,

Abd El-Hamid,

Ahmed

et al. 2024

Plants

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The QuEChERS method was adjusted to determine bifenthrin residues in grapes and grape leaves. Extraction and cleanup procedures were optimized to decrease co-extracted materials and enhance the detection of bifenthrin. The method was validated per the European Union (EU) Guidelines criteria. Accuracy ranged from 98.8% to 93.5% for grapes and grape leaves, respectively. Precision values were 5.5 and 6.4 (RSDr) and 7.4 and 6.7 (RSDR) for grapes and grape leaves, respectively. LOQs (the lowest spiking level) were 2 and 20 µg/kg for grapes and grape leaves, respectively. Linearity as determination coefficient (R2) values were 0.9997 and 0.9964 for grapes and grape leaves, respectively, in a matrix over 1–100 µg/L range of analyte concentration. This was very close to the value in the pure solvent (0.9999), showing the efficiency of the cleanup in removing the co-extracted and co-injected materials; the matrix effect was close to zero in both sample matrices. Dissipation of bifenthrin was studied in a supervised trial conducted in a grapevine field during the summer of 2023 at the recommended dose and double the dose. Dissipation factor k values were 0.1549 and 0.1672 (recommended dose) and 0.235 and 0.208 (double dose) for grapes and grape leaves, respectively. Pre-harvest interval (PHI) was calculated for the Maximum Residue Limit (MRL) values of the EU database. Residues of bifenthrin were removed effectively from grapes using simple washing with tap water in a laboratory study. Residues reached the MRL level of 0.3 mg/kg in both washing treatments, running or soaking in tap water treatments for 5 min. Removal from leaves did not decrease residue levels to the MRL in grape leaves.

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Section: Resultsmentioning

confidence: 99%

Section: Lod and Loqmentioning

confidence: 99%

Bifenthrin Residues in Table Grapevine: Method Optimization, Dissipation and Removal of Residues in Grapes and Grape Leaves

Alhewairini,

Abd El-Hamid,

Ahmed

et al. 2024

Plants

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“…Tianjin and Fengqiu are both located in north China, and the temperature difference during planting is not significant, so the degradation half‐lives of spinosad do not differ significantly. Therefore, temperature and light intensity may have significant effects on the degradation of spinosad (Li et al, 2021; Yang et al, 2022).…”

Section: Resultsmentioning

confidence: 99%

Dissipation and dietary exposure risk assessment of spinosad, thiocyclam, and its metabolite nereistoxin in cucumber and groundwater for different population groups

Lin

Wen

et al. 2023

Biomedical Chromatography

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A QuEChERS (quick, easy, cheap, effective, rugged, and safe) technique using ultrahigh‐performance liquid chromatography with tandem mass spectrometry for the analysis of spinosad (spinosyn A + spinosyn D), thiocyclam, and nereistoxin in cucumber was developed with mean recoveries of 93−104%, relative standard deviations of ≤9%, and limits of quantification of 0.01 mg/kg. Field trials of spinosad and thiocyclam were performed in 12 representative cultivating areas in China. Field trial results indicate that spinosyn A and spinosyn D easily dissipated in cucumber with half‐lives of 2.48–6.24 and <3 days, respectively. Nereistoxin was produced after thiocyclam application and was more persistent than its parent. The terminal residues of spinosad were all below the maximum residue limits (0.2 mg/kg) in China, whereas the terminal concentration of nereistoxin (calculated as the stoichiometric equivalent of thiocyclam), which was much higher than that of thiocyclam, was far beyond the maximum residue limits of thiocyclam in cucumber (0.01 mg/kg) established by the European Union. The predicted no‐effect concentrations of spinosyn A, spinosyn D, thiocyclam, and nereistoxin leaching into groundwater were estimated using China‐PEARL (Pesticide Emission Assessment at Regional and Local scales) models after application. However, the dietary (food and water) exposure risk quotient for different populations was below 1 with a preharvest interval set at 5 days after the last application, indicating that the application of spinosad and thiocyclam in cucumber was unlikely to pose unacceptable risk for human health. This study provides data for the safe use of spinosad and thiocyclam in cucumber ecosystem.

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“…If |ME| is below 10%, there is a negligible ME, and if |ME| is greater than 10%, there is a strong significant ME. − …”

Section: Methodsmentioning

confidence: 99%

Assessment of the Dissipation Behaviors, Residues, and Dietary Risk of Oxine-Copper in Cucumber and Watermelon by UPLC–MS/MS

Wang,

Li,

Meng

et al. 2024

ACS Omega

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Determination of five pesticides in kumquat: Dissipation behaviors, residues and their health risk assessment under field conditions

Cited by 13 publications

References 43 publications

Bifenthrin Residues in Table Grapevine: Method Optimization, Dissipation and Removal of Residues in Grapes and Grape Leaves

Bifenthrin Residues in Table Grapevine: Method Optimization, Dissipation and Removal of Residues in Grapes and Grape Leaves

Dissipation and dietary exposure risk assessment of spinosad, thiocyclam, and its metabolite nereistoxin in cucumber and groundwater for different population groups

Assessment of the Dissipation Behaviors, Residues, and Dietary Risk of Oxine-Copper in Cucumber and Watermelon by UPLC–MS/MS

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