Akademik Veri Yönetim Sistemi
BIOMEDICAL CHROMATOGRAPHY, cilt.32, sa.2, 2018 (SCI-Expanded)
Residue analysis of dimethomorph in Swiss chard cultivated at two different locations under greenhouse conditions was conducted using high-performance liquid chromatography-ultraviolet detection and confirmed by tandem mass spectrometry. The randomly collected samples (over 14days) were extracted with acetonitrile and purified using a Florisil solid-phase extraction cartridge. Linearity over a concentration range of 0.05-50.0mg/L had an excellent coefficient of determination of 0.9996. Recovery rate ranged from 82.98 to 95.43% with relative standard deviations 5.12% and limits of detection and quantification of 0.003 and 0.01mg/kg, respectively. The initial deposits [day 0 (2h post-application)] were considerably lower (7.57 and 8.55mg/kg for sites 1 and 2, respectively) than the maximum residue limit (30mg/kg) set by the Korean Ministry of Food and Drug Safety. The dissipation half-life was approximately the same, being 5.0 and 5.1days for sites 1 and 2, respectively. Risk assessment estimated as acceptable daily intake revealed a value of 0.084 or 0.094% (day 0) and 0.014% (10days post-application), for sites 1 and 2, respectively. The values indicated that dimethomorph can be safely used on Swiss chard, with no hazardous effects expected for Korean consumers.