CAJ | 학술논문

建立中性氧化铝分散固相萃取—火焰光度气相色谱法测定稻谷中乐果、毒死蜱、马拉硫磷、水胺硫磷、三唑磷5种有机磷农药残留量的分析方法。样品粉碎后经乙腈提取，中性氧化铝分散萃取，萃取液于70℃水浴中氮吹干，丙酮定容后用带火焰光度检测器的毛细管气相色谱仪（GC －FPD）测定。结果表明，5种有机磷在0．05～5．00μg／mL 范围具有良好的线性关系，乐果、毒死蜱、马拉硫磷、水胺硫磷、三唑磷的线性相关系数均为0．9999，检出限（LOD）为0．002 mg／kg，最低定量限（LOQ）为0．007 mg／kg。稻谷样品中低、中、高3个质量浓度的添加回收率在97．7％～108．0％之间，相对标准偏差（RSD，n ＝6）在0．8％～5．7％之间。方法可以满足稻谷中5种有机磷农药残留一次处理同时分析检测的要求。
건립중성양화려분산고상췌취—화염광도기상색보법측정도곡중악과、독사비、마랍류린、수알류린、삼서린5충유궤린농약잔류량적분석방법。양품분쇄후경을정제취，중성양화려분산췌취，췌취액우70℃수욕중담취간，병동정용후용대화염광도검측기적모세관기상색보의（GC －FPD）측정。결과표명，5충유궤린재0．05～5．00μg／mL 범위구유량호적선성관계，악과、독사비、마랍류린、수알류린、삼서린적선성상관계수균위0．9999，검출한（LOD）위0．002 mg／kg，최저정량한（LOQ）위0．007 mg／kg。도곡양품중저、중、고3개질량농도적첨가회수솔재97．7％～108．0％지간，상대표준편차（RSD，n ＝6）재0．8％～5．7％지간。방법가이만족도곡중5충유궤린농약잔류일차처리동시분석검측적요구。
A fast method was developed for the determination of 5 organophosphorus pesticide residues (dimethoate,chlorpyrifos,malathion,isocarbophos,fenitrothion)in paddy by neutral alumina disper-sive solid phase extraction -gas chromatography with flame photometric detector (DSPE -GC -FPD). The powdered samples were extracted with acetonitrile.The extract was purified by neutral alumina DSPE,dried by nitrogen evaporator with water bath at 70 ℃,and dissolved by acetone and determined by capillary gas chromatograph with flame photometric detector(CGC -FPD).The results showed that the 5 organophosphorus pesticide showed a good linear relationship in the range of 0.05 ~5.00 μg/mL,all of their linear correlation coefficients were 0.999 9,the limit of detection was 0.002 mg/kg,and the mini-mum quantitative limit was 0.007 mg/kg.The spiked recoveries at three levels of standard additions in paddy were between 97.7%~108.0%,and the RSDs (n =6)were between 0.8% ~5.7%.This meth-od could be used to determine 5 organophosphorus pesticide residues in paddy at the same time.