Pınar TALAY PINAR, Tamer TULUK, Zühre ŞENTÜRK

Determination of Pravastatin Drug Formulation by Squarewave Voltammetry on Glassy Carbon Elektrode

The electrochemical behavior of Pravastatin, a lipid-lowering drug, on a glassy carbon electrode was explored in Britton-Robinson buffer by using cyclic and square-wave voltammetry. Cyclic voltammetric studies indicated that the compound underwent irreversible oxidation, which was a diffusion-controlled process. Using square-wave voltammetry, Pravastatin could be determined at +1.24 V (vs. Ag/AgCl) in the concentration range 2.4×10-7-2.8×10-6 M at pH 2.0, with a detection limit of 5.0×10-8 M. The suggested method was successfully applied for the assay of Pravastatin in tablets.

Pravastatin’in Camımsı Karbon Elektrot Üzerinde Karedalga Voltametrisi ile İlaç Formülasyonunda Tayini

Lipit düşürücü ilaç olan Pravastatin′in, camımsı karbon elektrot üzerindeki elektrokimyasal davranışı, Britton-Robinson tamponu içerisinde dönüşümlü voltametri ve kare-dalga voltametrisi teknikleri kullanılarak araştırılmıştır. Dönüşümlü voltametrik çalışmalar, molekülün tersinmez olarak yürüyen yükseltgenmesinin difüzyon-kontrollü olduğunu göstermiştir. Kare-dalga voltametrisi kullanılarak, Pravastatin′in pH 2.0 değerinde +1.24 V (vs. Ag/AgCl) gerilim değerinde 2.4×10-7-2.8×10-6 M derişim aralığında (saptama sınırı, 5.0×10-8 M) tayini gerçekleştirilmiştir. Önerilen yöntem, Pravastatin′in tablet ilaç şeklinden tayinine başarıyla uygulanmıştır.

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