Journal of Pharmaceutical Analysis (Feb 2015)

Capillary electrophoresis to determine entrapment efficiency of a nanostructured lipid carrier loaded with piroxicam

  • Jessica Otarola,
  • Adriana Guillermina Lista,
  • Beatriz Fernández Band,
  • Mariano Garrido

DOI
https://doi.org/10.1016/j.jpha.2014.05.003
Journal volume & issue
Vol. 5, no. 1
pp. 70 – 73

Abstract

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A simple and fast capillary electrophoresis method has been developed to determine the amount of piroxicam loaded in a drug delivery system based on nanostructured lipid carriers (NLCs). The entrapment efficiency of the nanostructured lipid carrier was estimated by measuring the concentration of drug not entrapped in a suspension of NLC. The influence of different parameters on migration times, peak symmetry, efficiency and resolution was studied; these parameters included the pH of the electrophoretic buffer solution and the applied voltage. The piroxicam peak was obtained with a satisfactory resolution. The separation was carried out using a running buffer composed of 50 mM ammonium acetate and 13.75 mM ammonia at pH 9. The optimal voltage was 20 kV and the cartridge temperature was 20 °C. The corresponding calibration curve was linear over the range of 2.7–5.4 µg/mL of NLC suspension. The reproducibility of migration time and peak area were investigated, and the obtained RSD% values (n=5) were 0.99 and 2.13, respectively. Keywords: Capillary electrophoresis, Drug delivery system, Nanostructured lipid carrier, Piroxicam