Title:Stability-Indicating LC Assay with Determination of System Suitability Limits by a Robustness Test for Sitagliptin in Tablets and Assessment of Cytotoxicity for Degradation Products
Volume: 8
Issue: 4
Author(s): Alini Dall Cortivo Lange, Franciele Tams Gasperin, Carolina dos Santos Passos, Vitor Todeschini, Nadia Maria Volpato and Elfrides Eva Scherman Schapoval
Affiliation:
Keywords:
Cytotoxicity, Liquid Chromatography, Mass Spectrometry, Plackett-Burman, Sitagliptin, Stability-Indicating
Abstract: A stability-indicating LC method for the determination of the antihyperglycemic agent sitagliptin phosphate in
tablets was developed and validated using the Plackett-Burman experimental design for robustness evaluation and determination
of the system suitability limits. Analytical parameters were studied according to International Conference on
Harmonization (ICH) guidelines. The analytical column was operated with a solution of triethylamine 0.3% and acetonitrile
(75:25, v/v), adjusted to pH 4.0 at a flow rate of 1.0 mL min-1 and detection at 207 nm, maintained at 25 °C. In forced
degradation studies, the effects of acid and basic media with HCl 1M and NaOH 1M, respectively, oxidation, exposure to
UV-C light and temperature 60°C were investigated, showing no interference in the drug peak, and the possible breaches
of sitagliptin after degradation were suggested by mass analysis. The method was linear (r = 0.9993) at a concentration
range from 70.0 to 130.0 μg mL-1 and ANOVA showed a non-significant linearity deviation (p>0.05). Adequate results
were obtained for precision (inter and intra-day) and accuracy. Critical factors were selected to examine the method robustness
with the two-level Plackett-Burman experimental design and no significant factors were detected (p>0.05). The
sitagliptin cytotoxicity assay was determined for the degraded sample in methanolic solution, under UV-C light at 254
nm.
