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dc.contributor.authorr. m. shubietah
dc.contributor.authorali z. abu zuhri
dc.contributor.authora. g. fogg
dc.description.abstractGuanine is determined at the 5.0×10^?10 ?2.0×10^?7 mol/l level by differential-pulse adsorptive stripping voltammetry at a hanging mercury drop electrode using the reduction peak of its copper (II) complex at ?0.21 V vs. Ag-AgCl electrode. The optimum analytical conditions were found to be Britton-Robinson buffer solution (pH 4.8), an accumulation potential of 0.0 V and an accumulation time of 3 min. Under these conditions, the detection limit is 5.0×10^?10 mol/l and the relative standard deviation 2.6% for 1.0×10^?7 mol/l guanine. The method is compared with the previous voltammetric methods. The presence of some purine derivatives does not interfere.
dc.publisherFresenius' Journal of Analytical Chemistry
dc.titleDetermination of Nanomolar Level of Guanine by Differential – Pluse Adsorptive Cathodic Stripping Voltammetry of its Copper (II) complex
Appears in Collections:Faculty & Staff Scientific Research publications

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