alexa Simultaneous determination of aceclofenac, paracetamol, and chlorzoxazone by RP-HPLC in pharmaceutical dosage form.
Chemical Engineering

Chemical Engineering

Journal of Chromatography & Separation Techniques

Author(s): Shaikh KA, Devkhile AB, Shaikh KA, Devkhile AB

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Abstract A simple, rapid, and precise reversed-phase liquid chromatographic method is developed for simultaneous determination of paracetamol, aceclofenac, and chlorzoxazone in their ternary mixtures of commercial pharmaceutical preparation. This method uses a Zorbax SB C18, 250 x 4.6 mm, 5 microm analytical column. Mobile phase is acetonitrile and buffer (40:60, v/v), buffer containing 50 mM orthophosporic acid; pH of the buffer is adjusted to 6 with 10\% w/v sodium hydroxide solution. The instrumental settings are at a flow rate of 1 mL/min; the column temperature is 25 degrees C, and detector wavelength is 270 nm. The sample concentrations are measured on weight basis to avoid the internal standard. The method is validated and shown to be linear. The correlation coefficients for paracetamol, aceclofenac, and chlorzoxazone are 0.9981, 0.9990, and 0.9986, respectively. The recovery values for paracetamol, aceclofenac, and chlorzoxazone ranged from 100.7-101.4\%, 100.4-101.0\%, and 100.5-101.3\%, respectively. The relative standard deviation for six replicates is always less than 2\%. This HPLC method is successfully applied to the simultaneous quantitative analysis of the title drugs in tablets and can be applied for assay and dissolution test of tablets for the estimation of paracetamol, aceclofenac, and chlorozoxazone in their commercial samples.
This article was published in J Chromatogr Sci and referenced in Journal of Chromatography & Separation Techniques

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