CAJ | 학술논문

目的：采用QuEChERS法净化-气相色谱法检测大米中28种菊酯及有机氯类农药残留量。方法补水还原的方法加入去离子水将样品的含水率模拟至大致75%(5 g样品+12 mL水),选取无水硫酸镁、PSA、C18作为吸附剂,根据秤样量确定3种吸附剂的量为150 mg：25 mg：25 mg。提取净化后的大米用气相色谱-ECD检测。结果待测物质在0.01~2.00μg/mL范围内呈良好的线性关系(r为0.9735~0.9991),28种农药加标回收率为71.1%~116.8%,精密度为4.1%~15.2%。该方法的检测低限可达0.01~0.10 mg/kg。结论此法完全可满足日常进出口大米农残检验工作,同其他方法相比具有节能环保、操作简单、节约成本、省时高效的特点。
목적：채용QuEChERS법정화-기상색보법검측대미중28충국지급유궤록류농약잔류량。방법보수환원적방법가입거리자수장양품적함수솔모의지대치75%(5 g양품+12 mL수),선취무수류산미、PSA、C18작위흡부제,근거칭양량학정3충흡부제적량위150 mg：25 mg：25 mg。제취정화후적대미용기상색보-ECD검측。결과대측물질재0.01~2.00μg/mL범위내정량호적선성관계(r위0.9735~0.9991),28충농약가표회수솔위71.1%~116.8%,정밀도위4.1%~15.2%。해방법적검측저한가체0.01~0.10 mg/kg。결론차법완전가만족일상진출구대미농잔검험공작,동기타방법상비구유절능배보、조작간단、절약성본、성시고효적특점。
Objective To detect 28 kinds of pesticide residues in rice by QuEChERS-gas chromatography method. Methods The percentage of moisture of samples were analog to about 75% (5 g sample +12 mL water), by adding deionized water based on the method of replenishment reduction. The anhydrous magnesium sulfate, PSA, and C18 were selected as adsorbent, and the amount of the three adsorbent was determined as 150 mg:25 mg:25 mg. Extraction of rice after purification were detected by gas chromatography with ECD detection. Results It showed a good linear relationship of material in 0.01~2.00 μg/mL (r=0.9735~0.9991). The recoveries of 28 kinds of pesticide were 71.1%~116.8%, with the precision of 4.1%~15.2%. The limit of detection could reach 0.01~0.10 mg/kg. Conclusion This method could meet the daily inspection work of import and export of rice residue. Compared to other methods, it had the characteristics of energy saving and environmental protection, simple operation and cost saving, time saving, and high efficiency.