農產品中普克利殘留量標準檢驗方法之建立

ESTABLISHMENT OF STANDARD ANALYTICAL METHOD FOR THE DETERMINATION OF PROPICONAZOLE IN CROPS

本研究係進行殺菌劑普克利於農產品中殘留量檢驗方法之探討 與建立。普克利用丙酮自作物中抽出，以醋酸乙酯萃取，再經減壓濃縮、淨化、定容後，以氣相層析配合ECD檢出器及DB-608 毛細層析管柱偵測之；並依據衛生署公告之安全容許量標準，以大漿果類之鳳梨、核果類之茄枝及米類之白米為試驗作物，進行三重覆之回收試驗。經檢驗結果顯示；於鳳梨、荔枝及白米中添加0.5～1.5ppm檢體濃度之平均回收率，依序為83.4～ 87.4%、84.5～86.3%及85.9～88.2%。普克利添加於作物中之最低檢出量為0.02ppm。

An efficient method using gas chromatography (GC) with ECD (Electron Capture Detector) and a DB-608 capillary column to determine propiconazole in crop samples has been developed. Residues of propiconazole was extracted from crop samples with acetone, partitioned into ethylacetate, cleaned up using disposable florisil cartridge, and determined by GC-ECD subsequent to purification. Recoveries were determined by spiking untreated crop samples with propiconazole at 0.5 ~ 1.5 ppm, and recoveries ranged from 83.4 ~ 88.2%. The corresponding detection limit of the samples was 0.02 ppm.