Determination of the third generation oral cephalosporin cefpodoxime in biological fluids by high-speed high-performance liquid chromatography

Cefpodoxime Proxetil: A New Stability Indicating RP-HPLC Method

The present work describes the development of a sensitive and economic stability indicating high performance liquid chromatographic (HPLC) method for the determination of cefpodoxime proxetil (CP) as bulk drug and as pharmaceutical formulation. Both R and S isomers of the drug were separated using Phenomenex ( mm, 5 μm particle size) ODS column with a flow rate of 1 mL min−1 and an SPD 20 A UV detector to monitor the eluate at 252 nm. The isocratic method used a mobile phase consisting of methanol and phosphate buffer of pH 4.0 in the ratio 65 : 35. The linear regression analysis data for the calibration plots showed good linear relationship with in the working concentration range of 5–100 μg mL−1. The LOD and LOQ were 53 and 160 ng mL−1, respectively. CP was subjected to stress degradation using acid, alkali, hydrogen peroxide, dry heat, wet heat, and UV light. The standard drug peaks were well resolved from the degradation products’ peaks with significantly different retention time (Rt), and the resolution factor for the R and S isomers of CP was found to be greater than 2.

Simultaneous quantification of cefpodoxime proxetil and clavulanic acid in human plasma by LC-MS using solid phase extraction with application to pharmacokinetic studies

A simple, rapid and selective high performance liquid chromatography-atmospheric pressure chemical ionization-mass spectrometry (HPLC-APCI-MS) method was developed and validated for the simultaneous estimation of cefpodoxime proxetil (CDPX) and clavulanic acid (CA) in human plasma. Extraction of samples was done by solid phase extraction technique (SPE) and chloramphenicol used as internal standard. Chromatographic separation was carried out on a reverse phase Princeton SPHER C18 (150mm×4mm i.d., 5μm) column using mixture of methanol: acetonitrile: 2mM ammonium acetate (25:25:50, v/v, pH 3.5) at 0.8mL/min flow rate. Detection was performed on a single quadrupole MS by selected ion monitoring (SIM) mode via APCI source. The calibration curve was linear within the concentration range, 0.04-4.4μg/mL and 0.1-10.0μg/mL for CDPX and CA respectively. Pharmacokinetic parameters of tablet (CDPX 200mg, CA 125mg) were evaluated. Cmax, Tmax, T1/2, elimination rate constant (Kel), AUC0-t, and AUC0-∞ of tablet were 2.13±0.06μg/mL, 2h, 3.05±0.15h, 0.24±0.37h(-1), 6.81±0.14μg h/mL and 7.72±0.23μg h/mL respectively for cefpodoxime (CP), 5.34±0.28μg/mL, 2h, 2.73±0.25h, 0.26±0.31h(-1), 15.37±0.16μg h/mL and 16.59±0.53μg h/mL respectively for CA.

Analysis of cephalosporin antibiotics

A comprehensive review with 276 references for the analysis of members of an important class of drugs, cephalosporin antibiotics, is presented. The review covers most of the methods described for the analysis of these drugs in pure forms, in different pharmaceutical dosage forms and in biological fluids.

Development and validation of isomer specific RP-HPLC method for quantification of cefpodoxime proxetil

The present work explains the development and validation of a simple and reliable isomer specific liquid chromatographic method for the quantitative determination of cefpodoxime proxetil (CP) in rat in situ intestinal perfusate samples. Chromatography was carried out by reversed-phase technique on a C-18 column with a mobile phase composed of 20 mM ammonium acetate buffer (pH 5.0) and acetonitrile in the ratio of 62:38 pumped at a flow-rate of 1 ml/min. The detection was carried out at 235 nm and a column temperature of 30 degrees C. The method was evaluated for the various validation parameters, such as linearity, accuracy, precision, LOD, LOQ, specificity, selectivity, and sample stability. The results of intra- and inter-day validation (n = 3) showed the method to be efficient and the same was applied in an in situ permeability study conducted for CP in rats.