3101

138 دكتري

دكتري

﴿شيمي تجزيه﴾

اصفهان:دانشگاه صنعتي اصفهان، دانشكده شيمي

1384

هجده، 179، [II] ص.: مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

علي اصغر انصافي، تقي خياميان

مرتضي طالبي، حميد عبداللهي، حسن رحيمي منصور، بهزاد رضايي

1396/02/20

كتابنامه

شيمي

شيمي

ID138 دكتري

به فارسي و انگليسي:قابل رويت در نسخه ديجيتالي

Abstract In this project ultra trace amounts of Cu II Pb II Cd II and Zn II were determinedby differential pulse adsorptive cathodic stripping voltammetry DPAdCSV In addition theassisted transfer of proton and Cd2 were studied at a micro interface of two immiscibleelectrolyte solutions ITIES by cyclic voltammetry Cadmium and zinc ions were determined by DPAdCSV This method is based on theselective accumulation of the complexes of Cd II XO and Zn II XO on a HMDE At theoptimized conditions the relationship between peak currents for cadmium II and zinc II concentration were linear up to 580 and 260 ng ml respectively The detection limits forCd II and Zn II were 1 7 ng ml and 1 8 ng ml respectively In another work a selective method was presented for the determination of copper II based on DPAdCSV on HMDE The experimental factors were optimized using artificial neural network ANN At the optimized conditions a linear calibration curve was obtained for the concentration of Cu II in the range of 1 0 50 0 ng ml with a detection limit of 0 3 ng ml Cu II A wavelet neural network WNN model was proposed for extending the dynamic range of Cu II The WNN model consisted of three layers 2 8 1 with the Morlet mother wavelet transfer function in the hidden layer The model was able to extend the dynamic range of Cu II by 1 8 orders of magnitude Comparing of WNN and ANN results was demonstrated the superiority of the WNN model relative to ANN model In the other work the simultaneous determination of two different systems containingPb Cd and Cu Pb Cd using AdDPCSV were also described The effect of various parameterson the peak currents was investigated using ANN The relationship between peak currents forcadmium and lead concentrations were linear over the range of 4 0 150 0 and 5 0 150 0ng ml respectively The limits of detection were 0 98 and 1 18 ng ml for lead and cadmium respectively In the Cu II Pb II Cd II system there was intermetallic interaction Therefore ANN was utilized to solve this problem The ANN model was trained for simultaneouslydetermination of concentrations of Cu II Pb II and Cd II ions in the ranges of 1 50 5 200and 10 200 ng ml respectively The proposed methods were applied to the determination ofthe above mentioned ions in several real samples In addition an assisted transfer of proton by interfacial complexation with 2 acetylpyridine 4 phenyl 3 thiosemicarbazone APPT was studied at the micro interface oftwo immiscible electrolyte solution ITIES by cyclic voltammetry The dependence of halfwave potential of the ligand concentration suggests that the equilibrium is effectivelydisplaced towards a 1 1 proton ligand stoichiometry with a formation constant of logK f of10 4 The diffusion coefficient of proton in aqueous solution and diffusion coefficient ofHAPPT in organic phase were evaluated At the end a facilitated transfer of Cd2 by interfacial complexation 1 10 Phenanthroline was studied at ITIES by cyclic voltammetry The dependence of half wavepotential of the ligand concentration suggests that the equilibrium is effectively displacedtowards a 1 3 Cd2 ligand stoichiometry with a formation constant of log 3 of 29 6 Thediffusion coefficient of Cd2 in aqueous solution and diffusion coefficient of Cd Phen 32 inorganic phase were evaluated

علي اصغر انصافي، تقي خياميان

مرتضي طالبي، حميد عبداللهي، حسن رحيمي منصور، بهزاد رضايي