9111

8449

كارشناسي ارشد

شيمي تجزيه

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1392

يازده،52ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

تقي خياميان

17/4/93

محمد تقي جعفري، محمد سراجي

شيمي

ID8449

phase extraction SPE followed by negative corona discharge ion mobility spectrometry NCD IMS Mostafa Zarean Dolatabadi Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language Farsi Superviser Taghi Khayamian Email taghi@cc iut ac ir AbstractA two step microextraction method was performed for the extraction of trifluralin as a common herbicide inenvironmental water samples followed by continuous negative corona discharge ion mobility spectrometry CD IMS At first n octyl triethoxysilane surface modified magnetic iron oxide nanoparticles C8MNPs weresynthesized The DLLME was performed by injecting 1 mL of methanol disperser containing10 L of n hexane extraction solvent into 10 mL of water sample C8MNPs were immediately added to this solutionfor the retrieval of the extraction solvent and the extracted trifluralin by sonication Subsequently a magnetwas used to isolate the C8MNPs Then the water sample was decanted the nanoparticles were dried and thetrifluralin was extracted from nanoparticles by sonication with methanol Variables affecting the performanceof both steps were thoroughly optimized Under the optimized conditions analytical parameters such aslinearity and limit of detection were obtained Dynamic range 2 100ng ml and a low detection limit0 7ng mL were obtained The enrichment factor was 49 This method was applied for the determination oftrifluralin in well water samples Keywords Ion mobility spectrometry negative corona discharge Magnetic nanoparticle Trifluralin Dispersive Liquid Liquid Microextraction

تقي خياميان

محمد تقي جعفري، محمد سراجي