Residue, dissipation and dietary intake risk assessment of tolfenpyrad in four leafy green vegetables under greenhouse conditions

Dissipation, Residue and Dietary Intake Risk Assessment of Penthiopyrad in Eggplants and Its Removal Using Various Household Processing Techniques

“…Good linearity and low spiked level meet the method performance criteria for recovery and precision, and average recovery for each spiked level tested in the range of 70 to 120% and RSD ≤ 20% were used to demonstrate that the analytical method was feasible [ 26 ]. Some components presented in the matrix might influence the analytical signal of the pesticide, resulting in a differential recovery rate [ 18 ]. All of the data in the method validation trials confirmed that the established analytical approach followed the requirements of the CXG 90-2017 guidelines [ 27 ].…”

“…Although the dissipation of the R -(−)-stereoisomer was found to be a little more than that of the S -(+)-stereoisomer at 21 days, since the amount of penthiopyrad present in the eggplant at this time was quite low, the probability of errors in the data also increased accordingly. Moreover, because an EF value of 0.5 indicated no stereoselective dissipation [ 18 ], the penthiopyrad stereoisomers were approximately free of stereoselective degradation in eggplants. Overall, under field conditions, there was no stereoselective degradation of racemic penthiopyrad in eggplants, and its rate of dissipation was less different among the four application treatments, suggesting that spray dose and time may not affect penthiopyrad stereoisomer-selective dissipation in eggplants.…”

“…The LOD and LOQ were determined with a signal-to-noise ratio ( S/N ) = 3, and S/N = 10, respectively [ 17 ]. ME values were calculated as the ratio of the slope of matrix-matched standard calibration curve and the slope of solvent standard calibration curve [ 18 ]. The intra-day ( n = 5) and inter-day ( n = 15) recovery trials were used to evaluated the method’s accuracy and precision.…”

“…The chronic dietary intake risk was calculated as IEDI = FI × STMR/b.w. and RQ c = IEDI/ADI × 100% [ 18 ]. RQ a and RQ c are the acute risk quotient and chronic risk quotient, respectively.…”

Residue determination and dietary risk assessment of mesotrione, nicosulfuron, atrazine and its four metabolites in maize in China

“…Chronic dietary risk assessment is a crucial approach to evaluate the safety of agricultural product after the application of chemicals in fields. For a more comprehensive risk assessment, gender, age and region should be considered (Lan et al, 2022). Based on the dietary structure and population characteristics of Chinese residents (Jin, 2008), the body weights were ranged from 13.2-69.3 kg for urban residents and 12.1-64.7 kg for rural residents.…”