پديد آورنده :
حيدربيگي خوراسگاني، مليحه
عنوان :
استفاده از نانو لوله هاي كربني و لايه هاي هيدروكسيد مضاعف آلومينيم- منيزيم- گرافن اسيد در ساخت حسگر الكتروشيميايي جهت اندازه گيري پاپاورين در بافت هاي بيولوژيكي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شيمي-شيمي تجزيه
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي
صفحه شمار :
چهارده،63ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
بهزاد رضايي
استاد مشاور :
علي اصغر انصافي
توصيفگر ها :
الكترود خمير كربن
تاريخ نمايه سازي :
25/9/93
استاد داور :
محمدتقي جعفري، محمد محسن مومني
چكيده انگليسي :
64 Electrochemical determination of papaverine on Mg Al layered double hydroxide and CNT modified carbon paste electrode Maliheh Heidarbeigy M Heidarbeigy@ch iut ac ir Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 I R IranDegree M sc Language FarsiBehzad Rezaei Prof E mail rezaei@cc iut ac irAbstractIn this work electrochemical behavior of papaverine as an antispasmodic was investigated on modified carbonpaste electrode by using cyclic voltammetry differential pulse voltammetry electrochemical impedancespectroscopy and double step chronoamperometry techniques Multiwall carbon nanotube and layered doublehydroxide immobilized on carbon paste electrode Results show that CNT LDH CPE enhances anodic peakcurrent of papaverine compared with CNT CPE and LDH CPE The nyquist plots reveal the least chargetransfer resistant for the modified electrode which the result confirms catalytic effect of modifier The surfacemorphology of the electrode was studied by FE SEM images The effect of experimental parameters such as pHand scan rate on voltammetric response of papaverine was investigated Maximum current was observed inphosphate buffer pH 9 0 The electrode reaction followed a diffusion controlled pathway Wide dynamicrange 0 10 100 M with detection limit 0 04 M was obtained for papaverine under optimized conditions Therelative standard deviation for 5 repeated measurement of 25 M papa was obtained 3 9 The kineticsparameters such as electron transfer coefficient 0 61 diffusion coefficient D 3 9 10 4cm2s 1 and catalyticreaction rate constant K h 3 8 10 2 M 1 s 1 were also determined using electrochemical approaches Low cost easy preparation high sensitivity and good selectivity have made the modified electrode suitable fordetermination of papaverine in real samples Key words Multiwall carbon nanotubes Layered double hydroxide Papaverine Carbon paste electrode
استاد راهنما :
بهزاد رضايي
استاد مشاور :
علي اصغر انصافي
استاد داور :
محمدتقي جعفري، محمد محسن مومني
