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Abdulkareem Lawal,오지은,곽세연,이상협,최재원,SARKER ANIRUDDHA,경기성,김태화,김장억 한국환경농학회 2023 한국환경농학회지 Vol.42 No.3
Residue monitoring of propiconazole (PCZ) in cabbage, shallot, and spinach was conducted under multi-trial greenhouse conditions. This study aimed to understand the fate of the applied fungicide in these vegetables. Furthermore, the associated health risk of PCZ in leafy vegetables was assessed through dietary risk assessment. Commercially available PCZ (22% suspension concentrate) was administered thrice according to the OECD fungicide application interval guideline. The plant samples were extracted using a slightly modified QuEChERS technique and analyzed using gas chromatography-tandem mass spectrometry. The average PCZ recovery was between 84.5% and 117.6%, with a <5% coefficient of variance. The dissipation of PCZ residue in cabbage, shallot, and spinach after 14 days was 96%, 90%, and 99%, respectively, with half-lives of <5 days. Meanwhile, dietary risk assessments of PCZ residues in the studied vegetables using the risk quotient (RQ) were significant < 100 (RQ < 100). Thus, the population groups considered in this study were not at substantial risk from consuming leafy vegetables sprayed with PCZ following critical, good agricultural practices.
토양환경 중 Propiconazole 살균제의 제품 및 원제에 따른 분해 양상 비교
로알압둘카림 ( Lawal Abdulkareem ),곽세연 ( Se-yeon Kwak ),이상협 ( Sang-hyeob Lee ),아나루다사커 ( Aniruddha Sarker ),최재원 ( Jae-won Choi ),오지은 ( Ji-eun Oh ),김장억 ( Jang-eok Kim ) 한국환경농학회 2022 한국환경농학회 학술대회집 Vol.2022 No.-
The persistence of a named triazole fungicide; propiconazole in the soil is of great environmental concern because of its substantial risk of soil contamination, and bioaccumulation. This study evaluated the dissipation kinetics by equating the percentage purity of commercial-grade formulation (25% a.i.) and technical grade propiconazole (97.4% a.i.) in sterilized, and non-sterilized soil. The experiment was conducted using a laboratory incubator for 0, 1, 3, 5, 7, 15, 30, and 60 days at 28.0 °C. A rapid QuEChERS technique coupled with HPLC-UVD was employed for the propiconazole dissipation dynamics study. The findings showed that in non-sterilized soil, technical-grade propiconazole dissipated 1.8 times faster than commercial-grade, with a half-life of 20.3 days and 36.5 days, respectively. In contrast, in sterilized soil, technical-grade propiconazole dissipated 0.8 times faster than commercial grade, with a half-life of 69.22 days and 86.6 days, respectively. The rapid dissipation rate can be attributed to the high solubility of technical-grade propiconazole in the organic solvent (MeOH) used in the experiment and the tendency of commercial-grade propiconazole to form moderate to strong sorption with the soil because of dissolved stabilizers. Hence, this research complements parallel field studies under natural conditions for propiconazole and allows comparisons between the dissipation pattern and persistence observed in the field and the results from this laboratory experiment.