کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1207292 | 1493724 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Rapid determination of carbamate pesticides in food using dual counter-current chromatography directly interfaced with mass spectrometry Rapid determination of carbamate pesticides in food using dual counter-current chromatography directly interfaced with mass spectrometry](/preview/png/1207292.png)
Dual counter-current chromatography (dual CCC)–tandem mass spectrometry (MS/MS) was successfully performed with a newly designed spiral column for dual CCC. The small column capacity required for directly coupling with electrospray MS/MS was accomplished by forming a rectangular spiral groove on a plastic disk and sealing it with a PTFE sheet. This novel dual CCC–MS/MS technique was successfully applied for the rapid determination of methomyl, fenobucarb and carbaryl pesticides in food. A two-phase solvent system of n-hexane-acetonitrile-0.1% formic acid (45:45:10) was suitable for both good dual CCC separation and sufficient ionization of pesticides. Recoveries of these three pesticides from mandarin orange and spinach samples fortified at 0.05 mg/kg were in the range of 93–107% with relative standard deviations of 2.4–3.8%.
Journal: Journal of Chromatography A - Volume 1187, Issues 1–2, 11 April 2008, Pages 53–57