Abstract
Two accurate, sensitive, precise and selective HPLC and stability-indicating TLC methods were developed for the simultaneous determination of camylofin-2HCl and paracetamol. Forced acid, alkali and oxidative degradation of camylofin-2HCl were tried where complete degradation was achieved using 5 N HCl. HPLC method was developed to determine the mixture of the two drugs using Zorbax NH2 column and a mobile phase of 0.5% triethylamine and pH 3.0 adjusted with 0.1% phosphoric acid and methanol (70:30 v/v) over concentration ranges of 3–90 and 10–95 µg/mL for camylofin-2HCl and paracetamol, respectively.TLC method was used for the separation of camylofin from its acid degradate and paracetamol using chloroform–methanol–acetone–conc. ammonia (8:2:2:0.1, by volume) as developing system and band scanning at 254 nm over concentration ranges of 5–40 µg/band for camylofin-2HCl and 0.1–0.5 µg/band for paracetamol. The validation of two methods was carried out according to ICH guideline. Accuracy ranged between 98.47 and 100.67% for the two methods with acceptable precision RSD% ranging between 0.66 and 1.47%.
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