پديد آورنده :
معتمدي خوزاني، مرضيه
عنوان :
تهيه كامپوزيت گرافن اكسيد/نانوفيبرهاي آراميد انعطاف‌پذير براي ريزاستخراج لايه نازك پارابن‌ها از نمونه‌هاي آبي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شيمي تجزيه
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان
صفحه شمار :
دوازده، ۴۳ص.: مصور، جدول، نقشه، نمودار
استاد راهنما :
محمد سراجي
توصيفگر ها :
ريزاستخراج لايه نازك , كروماتوگرافي مايع با عملكرد بالا , پارابن‌ها , كامپوزيت گرافن اكسيد/نانو فيبرهاي آراميد , نمونه‌هاي آب
استاد داور :
علي اصغر انصافي، كيومرث زرگوش
تاريخ ورود اطلاعات :
1397/10/11
چكيده فارسي :
3 2 3 اثر زمان واجذب 72 3 2 4 اثر غلظت نمک 82 3 2 5 اثر زمان استخراج 82 3 3 ارقام شایستگی روش 92 3 3 1 دقت روش 92 3 3 2 دامنهی خطی حد تشخیص و حد کمی بودن 03 3 3 3 فاکتور غنی سازی 23 3 4 آنالیز نمونههای حقیق ی 33 3 5 مقایسه با سایر روشهای استخراج 53 3 6 نتیجهگیری 63 3 7 آیندهنگر ی 63 منابع 73 چکیده انگلیسی 44 نه
چكيده انگليسي :
44 Isfahan University of Technology Department of Chemistry Fabrication of a Flexible Graphene Oxide Aramid Nanofibers Nanocomposite for Thin Film Microextraction of Parabens from Water Samples Marzieh Motamedi Khouzani Marzieh motamedi@ch iut ac ir Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 Iran Degree M SC M Saraji Prof saraji@cc iut ac ir Abstract In the present study a flexible high strength composite consisting of graphene oxidesheets and aramid nanofibers GO ANF was made and used as a novel sorbent for thin filmmicroextraction The resulting composite consists of oriented graphene layers separated byrandomly dispersed ANFs interconnected by hydrogen bonding and interactio nsbetween the materials The GO ANF composite film was utilized for the pre concentratio nand determination of methyl ethyl propyl and butylparaben in water samples i e swimming pool water river water and wastewater High performance liquidchromatography with UV detection used for the detection The TFME conditions wereoptimized by studying the parameters such as the desorption solvent type desorptionvolume desorption time ionic strength of the sample and extraction time The optimalconditions for the method were as follow extraction time of 30 min acetonitrile as desorptionvolume desorption solvent volume of 150 L and extraction time of 5 min Also the resultsindicated that the ionic strength of the sample had no significant effect on extractionefficiency The limits of detection under the optimal conditions were 0 44 0 81 g L Themethod exhibited linearity in the range of 1 200 g L with the limit of quantification of 1 5 2 7 g L The determination coefficients were higher than 0 9971 The intra and inter assayprecision RSD n 3 were in the range of 3 6 7 7 and 5 0 17 respectively Therelative recovery values for the spiked samples were in the range 38 6 99 3 Theapplication of the present methodology to monitor trace levels of parabens in water samples showed that the method was easy to work up efficient and environmentally friend ly providing remarkable sensitivity performance as well as excellent robustness and analytica lreproducibility
استاد راهنما :
محمد سراجي
استاد داور :
علي اصغر انصافي، كيومرث زرگوش
