پديد آورنده :
فولاد گر، احسان
عنوان :
ساخت حسگر نوري جهت اندازه گيري يونهاي كادميم [II] و لانتانيم [III] بر پايه تثبيت 4- هيدروكسي سالوفن بر روي غشاء استات سلولزي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شيمي تجزيه
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان، دانشكده شيمي
صفحه شمار :
دوازده، 81، [II] ص. :مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
علي اصغر انصافي
توصيفگر ها :
حسگرهاي شيميايي , حسگرهاي الكتروشيميايي , تثبيت شناساگر , اسپكتروسكوپي
تاريخ نمايه سازي :
13/09/86
استاد داور :
مرتضي طالبي، محمد سراجي
چكيده فارسي :
به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال
چكيده انگليسي :
Abstract Ion optical sensors are one of the most common sensors in chemistry They areused for the determination of various ions in aqueous and organic solutions We report a new ion optical sensor for the determination of La III and Cd II based oncovalent immobilization of H2 4 hydroxy salophen at a transparent cellulose acetatefilm Cellulose acetate film had previously been subjected to a base hydrolysis and thenH2 4 hydroxy salophen was immobilized on it with or without thiourea In the fristcase thiourea was used as interface between H2 4 hydroxy salophen and cellulose filmand in the other one H2 4 hydroxy salophen is immobilized directly to the cellulose film The absorption spectra of the optode membrane in the presence of differentconcentrations of La III Cd II showed a pronounced changes of absorbance at434 nm 431 nm and this property was used as an analytical criteria The effects of different parameters such as hydrolysis time immobilization pH complexation pH immobilization time and contact time were investigated Underoptimal conditions this sensor has wide liner response rang of 1 0 10 2 1 0 10 5 M forLanthanum III and 5 0 10 3 1 0 10 6 M for Cadmium II ions The response time of theoptode thin film was 5 min to reach 98 of final signal The relative standard deviationfor determination of La III in the first case were 1 9 4 0 and 2 0 for 5 0 10 3 8 0 10 4 and 5 0 10 5 M n 7 respectively and in the second case for Cd II were 1 8 3 0 and 2 4 for 5 0 10 3 5 0 10 4 and 1 0 10 5 M n 6 respectively The influence of potential interfering ions on the determination of La III and Cd II were studied and the main interferents were removed by extraction methods The sensorwas applied for determination of La III and Cd II in real water samples
استاد راهنما :
علي اصغر انصافي
استاد داور :
مرتضي طالبي، محمد سراجي
