ENANTIOMETRIC SEPARATION OF SITAGLIPTIN IN A FIXED DOSE COMBINATION FORMULA OF SITAGLIPTIN AND METFORMIN BY A CHIRAL LIQUID CHROMATOGRAPHIC METHOD

Nagadeep Jaishetty; KAMARAJ PALANISAMY; ARTHANAREESWARI MARUTHAPILLAI

doi:10.22159/ijpps.2019v11i6.22699

Authors

Nagadeep Jaishetty Department of Chemistry, SRM University, Kattankulathur, Channai-603203, Tamilnadu., India
KAMARAJ PALANISAMY Department of Chemistry, SRM University, Kattankulathur, Channai-603203, Tamilnadu., India
ARTHANAREESWARI MARUTHAPILLAI Department of Chemistry, SRM University, Kattankulathur, Channai-603203, Tamilnadu., India

DOI:

https://doi.org/10.22159/ijpps.2019v11i6.22699

Keywords:

Sitagliptin phosphate, Metformin hydrochloride, Enantiomeric separation, Method development, Method validation

Abstract

Objective: Sitagliptin phosphate and metformin hydrochloride tablet is an FDA approved combination product for the treatment of diabetes mellitus type 2. There are no reported evidence for estimation of undesired (S)-sitagliptin in a combination product. The objective of this study was to develop a high sensitive liquid chromatography method for the determination of (S)-enantiomer of sitagliptin phosphate in a fixed dose combination formula of metformin and sitagliptin.

Methods: The proposed novel high-performance liquid chromatography (HPLC) method uses programmed gradient elution of a mixture of ethanol-diethylamine(DEA) 100:0.1 (v/v) as mobile phase-A and a mixture of methanol-water 60:40 (v/v) as mobile phase-B. The chromatographic conditions were designed to nullify the metformin interference and in which sitagliptin enantiomers elute first and followed by metformin. A satisfactory resolution (≥2.5) between (S)-sitagliptin and active form (R)-sitagliptin was achieved with gradient elution on Chiralpak IA column (5μm, 4 × 250 mm) at a flow rate of 0.5 ml/min and the detector wavelength set at 265 nm. The injection volume set as 10 µl. The developed method has been validated as per the International Conference on Harmonisation (ICH) guidelines.

Results: The proposed HPLC method for determination of (S)-sitagliptin, showed good linearity in the concentration range of 0.5 µg/ml to 13.6 µg/ml and capable to quantify accurately up to the lowest level (LOQ) of 0.017%. The validated method was successfully applied to quantify the (S)-sitagliptin for different marketed formulations of sitagliptin with metformin and sitagliptin alone, and the corresponding recovery values were found to be in the range of 95.1% to 98.4%.

Conclusion: The proposed validated HPLC method was found to be suitable for the quantitative determination of (S)-sitagliptin in the formulations of sitagliptin with metformin and sitagliptin alone.

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Author Biography

Nagadeep Jaishetty, Department of Chemistry, SRM University, Kattankulathur, Channai-603203, Tamilnadu., India

Research scholor, Deparment of Chemistry

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