SPECTROPHOTOMETRIC DETERMINATION OF ETODOLAC USING CHARGE TRANSFER COMPLEXAbstract
In this study, we developed a cheap and precise analytic method to measure Etodolac concentration in bulk and pharmaceutical formula. The modified, updated method depends on the reaction between ferric ion and Etodolac to yield ferrous ion. Then the former ion reacted with potassium ferric cyanide to form colored compound has a maximum absorbance at 700 nm. The method was validated by calculating the precision and accuracy. The method follows Beer-Lamber law so that we used the range between 1-22.5 µg/mL and the correlation coefficient at 0.997. Accuracy and precision of the proposed method were estimated and shown average of recoveries between (96.67-99.0%) with precision represented by RSD % equal to 1.02. We also calculated the detection limit (LOD) and quantitative limit (LOQ), which respectively were 0.6 µg/mL and 1.2 µg/mL. The modified suggested method was used to measure Etodolac in pharmaceutical preparation without drug additives interference and shows a good agreement with the standard method. Therefore, it can be used for routine works for quality control for the estimation of the Etodolac in bulk and pharmaceutical preparation as tablets.
A. M. Mahood and S. L. Alkhafaji *
Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Kerbala, Iraq.
30 June 2018
30 August 2018
10 September 2018
01 March 2019