Determination, Dissipation and Decontamination of Thiamethoxam Using LC-MS/MS in Okra Fruits
DOI:
https://doi.org/10.55446/IJE.2021.19Keywords:
Thiamethoxam, Okra, Fruits, Residue, Decontamination, Dissipation, LC-MS/MS, Recovery, Single and Double Dose, Half-Life, Dietary Exposure.Abstract
An analytical method was developed and validated for the determination of thiamethoxam in okra using LC-MS/MS. The LOQ was 0.002 μg g-1. The recoveries at the fortification level of 0.002, 0.01, and 0.02 μg g-1 were in the range of 75.45-80.99% with an RSD of 3.54-4.16%. Thiamethoxam applied at 25 (single dose) and 50 (double dose) g a.i. ha, recorded initial deposit of 1.541 and 3.117 μg g-1 and half-life of 3.28 and 4.05 days were observed at single and double dose, respectively. The residue of thiamethoxam in fruits was reduced by simple decontamination methods to 20.34-60.63%. Risk due to the dietary exposure was calculated for thiamethoxam and found safe on all the sampling days.
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