استخراج و اندازه گيري آفت كش هاي اورگانوكلره در شيره با استفاده از استخراج فاز جامد و كروماتوگرافي گازي SPE-GC

The determination of organochlorine pesticides in milk has been carried out through soiid-phase extraction (SPE) and then separation and detection by a gas chromatographic method (GC- ECD) . The procedure used for the extraction was an off-line method which uses a packed stainless-steel microcolumn (10mmx3mm I.D.) Packed with 40 mg C13 packing. The microcolumn was used for 35-40 extractions . All the calibration curves were linear in the range 0.001-0.2 mg/m. Detection limits and percent recoveries for the above compounds varied between 8-30 ng/m and 30-60 percent, respectively. The developed method was applied to several milk samples including cowʹs , sheepʹs, pasturized and powdered milk.