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Spectrofluorometric Determination of Methocarbamol in Pharmaceutical Preparations and Human Plasma

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Abstract

A simple, sensitive and rapid spectrofluorometric method for determination of methocarbamol in pharmaceutical formulations and spiked human plasma has been developed. The proposed method is based on the measurement of the native fluorescence of methocarbamol in methanol at 313 nm after excitation at 277 nm. The relative fluorescence intensity-concentration plot was rectilinear over the range of 0.05–2.0 μg/mL, with good correlation (r = 0.9999), limit of detection of 0.007 μg/ mL and a lower limit of quantification of 0.022 μg/ mL. The described method was successfully applied for the determination of methocarbamol in its tablets without interference from co-formulated drugs, such as aspirin, diclofenac, paracetamol and ibuprofen, The results obtained were in good agreement with those obtained using the official method (USP 30).The high sensitivity of the method allowed the determination of the studied drug in spiked human plasma with average percentage recovery of 99.42 ± 3.84.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Faculty of Pharmacy, University of Mansoura, Mansoura, 35516, Egypt

    Mohamed Walash, Fathalla Belal, Manal Eid & Samah Abo EL Abass

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  1. Mohamed Walash
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  2. Fathalla Belal
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  3. Manal Eid
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  4. Samah Abo EL Abass
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Correspondence to Manal Eid.

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Walash, M., Belal, F., Eid, M. et al. Spectrofluorometric Determination of Methocarbamol in Pharmaceutical Preparations and Human Plasma. J Fluoresc 21, 555–561 (2011). https://doi.org/10.1007/s10895-010-0742-x

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  • DOI: https://doi.org/10.1007/s10895-010-0742-x

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