4311

4082

كارشناسي ارشد

شيمي فيزيك

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1387

نه، 64، [II] ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

محمود تبريزچي

1/11/87

محمدكاظم اميني، حسن قاضي عسگر

شيمي

ID4082

به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال

Abstract In this thesis an electron capture detector ECD with an electron source based on corona discharge in nitrogen is introduced For more than four decades ECD has been used as GC detector Since its introduction in 1960 the electron source which is radioactive material has remained unchanged Due to certain drawbacks for radioactive materials such as safety surface reactivity and large cell volume many efforts were performed to develop alternative non radioactive electron sources Approximately none of these has successfully replaced the radioactive material The invented detector consists of two chambers The first chamber contains the electron source which consists of two electrodes for electrical discharge to produce electrons The second region in which electron capture happens consists of the collector and an entrance for the GC effluent The electrical current registered at the collector is amplified and is plotted against time This detector has a detection limit of about 33 pg for chloroform and which is expected to be reduced if a better design is used Keywords Electron Capture Detector Gas Chromatography Electron Source Discharge pdfMachine A pdf writer that produces quality PDF files with ease Produce quality PDF files in seconds and preserve the integrity of your original documents Compatible across nearly all Windows platforms simply open the document you want to convert click print select the Broadgun pdfMachine printer and that s it Get yours now

محمود تبريزچي

محمدكاظم اميني، حسن قاضي عسگر