Abstract
Introduction: A simple and reliable high performance liquid chromatographic method has been developed for the quantitative determination of pregabalin in bulk and dosage form. Pregabalin, a γ amino butyric acid analogue, has negligible sensitivity to UV or fluorescence detection. Hence, it has been derivatized by ninhydrin to form a chromophoric complex that could be quantified by UV detection.
Materials and Methods: The concentration of ninhydrin was set to 5 mg/ml and a phosphate buffer solution (pH 7.4) was used as a solvent for the reaction. The resultant complex was separated by HPLC and detected by a UV detector at 569nm wavelength.
Results: The developed method showed a linear response within 50 to 600 μg/mL of pregabalin. The method was accurate with mean recovery values within 100 ± 2%. The repeatability of the method was established by intra-day and inter-day precision study. Finally, a commercial pregabalin capsule was assayed by the developed HPLC method including ninhydrin derivatization. The result of the mean assay was found to be 100.37 ±2.94 %.
Conclusion: This is the first time we are reporting pregabalin analysis using ninhydrin derivatization for HPLC analysis. Therefore, the developed method can be considered as a significant improvement in pregabalin quantitation and it can be easily applied for routine quality control tests of pregabalin.
Keywords: Pregabalin, ninhydrin, precolumn derivatization, HPLC, UV detection, analytical method development, analytical method validation.
Graphical Abstract
[http://dx.doi.org/10.1186/1752-153X-5-59] [PMID: 21982305]
[http://dx.doi.org/10.1097/FTD.0000000000000325] [PMID: 27465975]
[http://dx.doi.org/10.1016/j.jpba.2015.02.023] [PMID: 25767905]
[http://dx.doi.org/10.1365/s10337-007-0440-2]
[http://dx.doi.org/10.1016/S1570-0232(04)00662-2] [PMID: 15380728]
[http://dx.doi.org/10.1016/j.jaubas.2015.03.002]
[http://dx.doi.org/10.1016/j.saa.2018.06.027] [PMID: 29906646]
[http://dx.doi.org/10.1007/s40005-017-0305-0]
[http://dx.doi.org/10.1186/2093-3371-4-17]
[http://dx.doi.org/10.1021/jf030490p] [PMID: 14759124]
[http://dx.doi.org/10.1016/j.ejmech.2010.02.058] [PMID: 20381213]