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Residue analysis of picoxystrobin in oriental melon using gas chromatography coupled with electron capture detection and mass spectrometric confirmation: application to dissipation kinetics and risk assessment

Kabir, Md. Humayun, Rahman, Md. Musfiqur, Abd El-Aty, A. M., Chung, Hyung Suk, Lee, Han Sol, Park, Sun-Hyang, Hacımüftüoğlu, Fazil, Chang, Byung-Joon, Shin, Ho-Chul, Shim, Jae-Han
Food science and biotechnology 2017 v.26 no.4 pp. 1145-1153
Cucumis melo, acceptable daily intake, acetonitrile, adults, body weight, gas chromatography-mass spectrometry, half life, melons, pesticide application, risk, risk assessment, salting, sodium chloride, statistical analysis
This study was carried out to determine the residual amounts of picoxystrobin in oriental melon (Cucumis melo L.) grown under plastic house conditions at two different sites. Samples collected over 10 days were extracted using acetonitrile and salting out (using solid sodium chloride) and purified using Florisil SPE cartridges. The analyte was determined using GC–ECD and field-incurred residues were verified using GC–MS. The calibration curve was linear over the range 0.02–2.0 mg/L with a R ² = 0.9998. The LOD and LOQ were 0.003 and 0.01 mg/kg, respectively. Recoveries, tested at three spiking levels, were satisfactory with rates in the range 87.7–101.5% and relative standard deviations ≤9.6. The dissipation half-lives were 3.4 and 3.7 days for sites 1 and 2, respectively. Hazard estimates obtained using hazard quotients revealed no health risk from the suggested pesticide application dosage when considering an adult’s body weight, oriental melon consumption, and the acceptable daily intake of picoxystrobin.