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04 포스터 발표 : 환경 화학 분야(PC) ; PC-15 : GC-μECD를 이용한 상추중 Metrafenone과 Boscalid분석을 위한 QuEChERS방법 비교
임소정 ( So Jeong Im ),무스픽 ( Md. Musfiqur Rahman ),김성우 ( Sung Woo Kim ),압두 ( A. M. Abd El-aty ),최정희 ( Jeong Heui Choi ),카빌 ( Md. Humayun Kabir ),팔하 ( Waziha Farha ),정다이 ( Da I Jung ),이영준 ( Young Jun Lee 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
Three versions of the QuEChERS method (quick,easy, cheap, effective, rugged and safe) . the original (unbuffered), modified acetate-buffered, and citrate-buffered versions were compared for thedetermination of metrafenone and boscalid residues in lettuce via gas chromatography-micro electron capture detector (GC-μECD). Onlymodified acetate-buffered version provided acceptable and more consistent recoveries for both of the target analytes than the other versions. Matrix matched calibration curves prepared for the analytes provided good linearity over the calibration ranges with the co-efficient of determination (r2) ≥ 0.998. Limit of detection (LOD) and quantification (LOQ) were 0.003 and 0.01 mg/kg for both of the analytes. Method was validated in triplicate at two fortification level and recovery of modified acetate buffered version was ranges between 77.0 and 88.1% with relative standard deviation (RSD) < 5 for the quantified analytes. The developed method was applied to the field incurred lettuce sample where half-life of metrafenone and boscalid were found 2.6 and 2.9 days respectively for double doses and 3.4 and 3.6 days respectively for triple doses.
04 포스터 발표 : 환경 화학 분야(PC) ; PC-14 : LC-MS/MS를 이용한 돼지, 닭고기, 계란중 Phorate와 대사체의 분석법 개발
무스픽 ( Md. Musfiqur Rahman ),김성우 ( Sung Woo Kim ),최정희 ( Jeong Heui Choi ),이영준 ( Young Jun Lee ),압두 ( A. M. Abd El-aty ),팔하 ( Waziha Farha ),정다이 ( Da I Jung ),카빌 ( Md. Humayun Kabir ),임소정 ( So Jeong Im 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
An analytical method was validated for phorate and its five metabolites (phoratesulfone, phoratesulfoxide, phorateoxon, phorateoxonsulfone, and phorateoxonsulfoxide) in pork, chicken, and egg using LC-MS/MS. The method was validated following MFDS (ministry of food and drug safety, Republic of Korea) official method developed for beef and milk. Extraction was carried out following QuEChERS using acidified acetonitrile and salt and purification was conducted via dSPE using primary secondary amine (PSA) and C18 sorbent. Calibration curve in matrix was linear with determination coefficient (r2) ≥ 0.995 for all of the analyte in three target matrices. Limit of detection (LOD) and quantification (LOQ) were 0.001 and 0.004 mg/kg for all of the matrices. Recovery was performed at three fortification level resulted acceptable values ranging from 74.22 and 119.89% with relative standard deviation (RSD)<6%. The developed method can be applied for routine analysis of phorate and its metabolites in different animal origin.
04 포스터 발표 : 환경 화학 분야(PC) ; PC-16 : GC-μECD를 이용한 상추중 Metrafenone 잔류양상 연구
카빌 ( Md. Humayun Kabir ),임소정 ( So Jeong Im ),무스픽 ( Md. Musfiqur Rahman ),김성우 ( Sung Woo Kim ),최정희 ( Jeong Heui Choi ),압두 ( A. M. Abd El-aty ),팔하 ( Waziha Farha ),정다이 ( Da I Jung ),이영준 ( Young Jun Lee 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
The dissipation pattern of metrafenone in green leafy vegetables (lettuce) grown under green house condition were investigated using GC-μECD. Residues were extracted using acetone and samples were taken out by liquid-liquid extraction. Matrix component was cleaned by SPE silica cartridge. Calibration curves were linear over the concentration ranges (0.02-5.0 mg/kg) with a determination co-efficient (r2)≥0.999. The limit of detection (LOD) and quantification (LOQ) were 0.006 and 0.02 mg/kg respectively. Recoveries at two fortification level were ranged between 78.5% and 113.3% with relative standard deviation (RSD)<9%. Residues half-life from dissipation pattern of site 1 and 2 double/triple spray was 2.3/2.2 and 4.9/5.0 days respectively. The method was effective and sensitive enough to determine the residue of metrafenone in field-incurred lettuce sample.