固相萃取填料对有机磷农残萃取效率

Study on the extraction efficiency of organophosphorus in cauliflower by different solid-phase cartridges

以花椰菜中杀扑磷和马拉硫磷为研究对象，比较C18、Florisil和HLB柱的萃取效率。样品经过固相萃取柱富集后，使用高效液相色谱分析。通过比较不同固相填料的萃取回收率，选择最佳的萃取条件及萃取小柱。结果表明，3种固相填料中，Florisil柱的萃取回收率最高。经过对实际样品的加标实验后，两种有机磷农药的回收率在79％～112％之间，适合花椰菜中痕量有机磷农药残留测定的分析要求。

The extraction efficiency of methidathion and malathion in cauliflower is compared by three dif-ferent solid-phase cartridges ,C18 ,Florisil and Hydrophile-Lipophilic Balance （HLB） .After extracted by solid phase extraction （SPE） ,the cauliflower samples are analyzed by high performance liquid chroma-tography （HPLC） .The suitable method and cartridge are found from the extraction recoveries .Among the three kinds of solid-phase being tested ,Florisil cartridge is the best one .By using this method ,the re-coveries of fortified samples are between 79% ~112% ,it can be used in the analysis of methidathion and malathion in cauliflower samples .