Validated stability indicating HPLC method for estimation of theophylline from a novel microsphere formulation

Supriya Shidhaye, Sheetal Malke, Vilasrao Kadam

Abstract


A new, simple, specific, precise and robust isocratic reversed-phase (RP) stability-indicating high-performance liquid
chromatographic (HPLC) method was developed and validated for determination of theophylline from a novel
formulation. The liquid chromatographic separation was achieved isocratically using a mobile phase of acetonitrile: 50 mM
sodium acetate buffer (15:85) adjusted to pH 6.5 using dilute hydrochloric acid. The analysis was carried out using Hi-Q-Sil
C18 column [250 mm x 4.6 mm, 5 μm] at flow rate of 1 ml/min and the UV detection at 270 nm. The method was validated
for accuracy, precision, linearity, range, selectivity, and robustness. The linearity of the proposed method was investigated
in the range of 1 to 24 μg/ml (r2 = 0.9995). The drug was subjected to oxidation, hydrolysis, heat, and photolysis to apply
stress conditions. The method provided good peak parameters with retention time of 8.6 ± 0.3 min. Degradation products
resulting from stress studies did not interfere with the detection of theophylline and the assay can thus be considered as
stability-indicating.

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DOI: http://dx.doi.org/10.22377/ajp.v3i1.235

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