1 Ocak 2014 Dergi makalesi Açık Erişim

Tarinc, Derya; Dogan-Topal, Burcu; Golcu, Aysegul; Ozkan, Sibel A.

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    <subfield code="a">A voltammetric study of the oxidation of Ceftazidime (CEFT) has been carried out at the glassy carbon electrode by cyclic, differential pulse (DPV) and square wave (SWV) voltammetry. The oxidation of CEFT was irreversible and exhibited diffusion controlled process depending on pH. The oxidation mechanism was proposed and discussed. According to the linear relationship between the peak current and concentration, DPV and SWV voltammetric methods for CEFT assay in pharmaceutical dosage forms and human urine were developed. For analytical purposes, a well resolved diffusion controlled voltammetric peak was obtained in 0.1 M H2SO4 at 1.00 and 1.02 V for differential pulse and square wave voltammetric techniques, respectively. The linear response was obtained within the range of 4 x 10(-6)-8 x 10(-5) M with a detection limit of 6 x 10(-7) M for differential pulse and 4 x 10(-6)-2 x 10(-4) M with a detection limit of 1 x 10(-6) M for square wave voltammetric technique. The determination of CEFT in 0.1 M H2SO4 was possible over the 2 x 10(-6)-1 x 10(-4) M range in urine sample for both techniques. The standard addition method was used for the recovery studies.</subfield>
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