Abstract
A microemulsion (ME) carrier system containing diclofenac diethylamine (DDA) was developed and physicochemically characterized. In addition, a methodology for analytical determination of DDA by UV-Vis spectrophotometry was validated. The methodology used to produce the ME was simple and reliable, producing a stable ME system with a high DDA entrapment efficiency of 89.6 ± 14.19%. The ME system presents a mean droplet size, conductivity, pH, refractive index and viscosity of around 50 nm, 300 µS cm−1, 7.0, 1.399, and 110 mPa, respectively. Furthermore, the analytical method developed to evaluate the DDA content was validated and used to quantify DDA in the ME formulations.
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