Establishment of Pre-Harvest Residue Limit (PHRL) of Buprofezin and Pyridaben in Squash

Hwang, Kyung Hoon; Kim, Hyun Jin; Sun, Jung-Hun; Jeong, Kyoung Su; Lee, Tae Hyun; Moon, Joon‐Kwan

doi:10.7585/kjps.2019.23.3.154

Cited by 6 publications

(1 citation statement)

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“…In this study, the samples were extracted using acetone and partitioned using dichloromethane (DCM) without further clean-up to assess their decline patterns without establishing the pre-harvest residue limit (PHRL) data. Hwang et al (17) reported an analysis of cyenopyrafen in grapes using ultrafast liquid chromatography coupled with photodiode array detection (UFLC-PDA), in which the samples were extracted using acetone, partitioned using n-hexane/DCM (8/2, v/v), and purified using a silica solid-phase extraction (SPE) cartridge. However, no reports were retrieved from the databases for the determination of cyenopyrafen residues in Asian pear.…”

Section: Introductionmentioning

confidence: 99%

Decline pattern and risk assessment of cyenopyrafen in different varieties of Asian pear using liquid chromatography and tandem mass spectrometry

Kabir

El‐Aty

Kim

et al. 2017

Food Sci Biotechnol

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The dissipation pattern of a commercial cyenopyrafen formulation sprayed at the recommended dose on Asian pears (two different species) grown at two different sites was investigated using liquid chromatography-ultraviolet detection. Samples collected randomly over 14 days were extracted using acetone, partitioned using -hexane/dichloromethane (8/2, v/v), and purified using a Florisil solidphase extraction cartridge. The residues in field-incurred samples were confirmed via liquid chromatography-tandem mass spectrometry. The method was validated in terms of excellent linearity in the solvent ( =1); moreover, satisfactory recoveries (89.0-107.3%) were obtained at three fortification levels with a relative standard deviation (RSD)≤5.0% and the limits of detection and quantification of 0.0033 and 0.01 mg/kg, respectively. Although the residual levels at both sites were lower than the maximum residue limit (MRL=1 mg/kg), the dissipation at Site 2 was faster than that at Site 1. Consequently, the half-life (t) in Site 2 (5.2 d) was shorter than that in Site 1 (9.8 d). Risk assessment at zero days showed acceptable daily intakes (%) of 27.25% and 24.52% at Sites 1 and 2, respectively, indicating that these fruit species are safe for consumption.

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Section: Introductionmentioning

confidence: 99%