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Development and validation of new hplc method for simultaneous estimation of l-lysine hydrochloride and l-carnitine-l-tartrate in pharmaceutical dosage form

Author(s): MA Qadir1, M Ahmed1, WA Hussain2, MS Tahir3
1Institute of Chemistry, University of Punjab, Lahore, Pakistan 2Department of Chemistry, Minhaj University, Lahore, Pakistan 3Highnoon Laboratories Limited, Lahore, Pakistan

Correspondence Address:
M Ahmed Institute of Chemistry, University of Punjab, Lahore Pakistan E-mail: [email protected]

A new analytical method is developed and validates for simultaneous estimation of L-lysine hydrochloride and L-carnitine-L-tartrate in single pharmaceutical dosage form by means of high resolution HPLC. The chromatographic procedure was carried out using C18-5 µm (4.6 mm × 250 mm), column. Optimally suited mobile phase was made to run in an isocratic elution mode whose composition was 10 mM of potassium dihydrogen phosphate adjusted with triethylamine to a pH of 7.5 and pumped at a flow rate of 0.50 ml/min through chromatographic system. The detector's wavelength was 214 nm. The accuracy of the analytical method was determined keeping into account the recovery of analytes, which in this case remains well within the accepted standards that is 95-105%. Detection limit for L-lysine hydrochloride and L-carnitine-L-tartrate are 1.47 μg/ml and 0.85 μg/ml while quantitation limit for L-lysine hydrochloride and L-carnitine-L-tartrate is 4.41 and 2.55 μg/ml, respectively. All the statistical results were validated performing precision, accuracy, linearity, specificity studies for analytes concentration from 70-130%. The outcome of results confirmed that the method was in consonance with the acceptance criteria.

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