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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/14938
Title: Analytical Application of Ion Transfer across the Memembrane Stabilized Interface between Two Immiscible Electrolyte Solutions in a Flow Injection System
???metadata.dc.contributor.*???: Dr. B. Hundhammer
Dr. Theodros Solomon
Abegaz, Mulat
Issue Date: Jun-1990
Publisher: Addis Ababa University
Abstract: Using the voltammetric senor which is constracted in our laboratory and the membrane stabilized interface between two immiscible electrolyte solution in a flow injection system the transfer of anions (CIO ,NO & 01 )and cations 4 3 (K Na )from the aqueous to the organic phase have been investigated.In order to determine the working potential region of the system the behaviour of the potential-current dependence of the supporting electrolytes were studied. The iR drop resulting fron the diJution effect of the distilled water at the interface has been investigated and it was compensated by increasing the concentration of the supporting electrolyte in the aqueous phase . Dependence of the peak current on the applied potentials and on concentration of various ions (010 , NO , K & Na ) have 4 3 been investigated. The determination of le and Na: was made in the presence of dibenzo-18-crown-6 in the organic phase.The method was applyed to the determination of Na and K in blood serum samples and the values obtained were in good agreement with the values obtained by flame photometric method. The selectivity of the method was also studied and was found to be potential dependent and governed by the partial sensitivity of the individual ion. A method has also been proposed for the determin8tion of a particular ion in the presence of another ion,The detection limit of the detector has been determined to be about 0.25 phi for perchlorate ion . Thus the method is rapid, precise, sensitive for the determination of some anions and cations.
Description: A Thesis Presented to the School of Graduate Studies Addis Ababa University in Partial Fulfillment of the Requirements for the Degree of Master of Science in Chemistry
URI: http://hdl.handle.net/123456789/14938
Appears in Collections:Thesis - Chemistry

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