JOURNAL ARTICLE
VALIDATION STUDIES
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Stability-Indicating TLC-densitometric determination of nebivolol hydrochloride in bulk and pharmaceutical dosage form.

A simple, selective, precise, and stability-indicating high-performance thin-layer chromatographic (HPTLC) method for densitometric determination of nebivolol hydrochloride both as a bulk drug and in formulation was developed and validated as per the international conference on harmonization guidelines (ICH). The method employed TLC aluminium plates precoated with silica gel 60F254 as the stationary phase. The solvent system consisted of toluene-methanol-triethylamine (3.8:1.2:0.2 v/v/v). Densitometry analysis of nebivolol hydrochloride was carried out in the absorbance mode at 281 nm. The system was found to give compact spot for nebivolol hydrochloride (R(f) value of 0.33 +/- 0.02). The linear regression analysis data for the calibration plots showed good relationship with r(2)= 0.9994 +/- 0.0002 in the concentration range 500-3000 ng/spot. The mean value +/- SD of slope and intercept were 3.761 +/- 0.017 and 127.39 +/- 19.53 with respect to peak area. The limits of detection (LOD) and limit of quantitation (LOQ) were 63.10 ng/spot and 191.23 ng/ spot, respectively. Nebivolol hydrochloride was subjected to acid and alkali hydrolysis, oxidation, thermal degradation, and photodegradation. All the peaks of degradation products were well-resolved from the standard drug with significantly different R(f) values. Statistical analysis proves that the method is repeatable, selective and accurate for the estimation of said drug. The proposed developed HPTLC method can be applied for identification and quantitative determination of nebivolol hydrochloride in the bulk and pharmaceutical dosage form.

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