Gallo Martínez L, Campíns Falcó P, Sevillano Cabeza A. Comparison of several methods used for the determination of cephalosporins. Analysis of cephalexin in pharmaceutical samples.
J Pharm Biomed Anal 2002;
29:405-23. [PMID:
12062642 DOI:
10.1016/s0731-7085(02)00089-4]
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Abstract
The precision of UV absorbance of intact and acid degraded cephalosporins, ninhydrin, high performance liquid chromatography and iodometric methods used for analysis of cefoxitin, cefotaxime, cephazolin and cephalexin were compared. To obtain the calibration graphs the analytical signal used were: absorbance, first derivative absorbance, second derivative absorbance and H-point Standard Additions Method by using absorbance values at two selected wavelengths as analytical signal. These methods and calibration graphs were also used for the determination of cephalexin in pharmaceutical samples.
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