Simultaneous determination of cefotaxime and desacetylcefotaxime in human plasma and cerebrospinal fluid by high-performance liquid chromatography.
A simple and sensitive HPLC method for the simultaneous determination of cefotaxime (I) and desacetylcefotaxime (II) in human plasma and cerebrospinal fluid (CSF) is described. The assay involves deproteinisation and subsequent separation on a reversed-phase HPLC column, with ultraviolet detection at 262 nm. Retention times were 6.8 and 2.2 min for cefotaxime and desacetylcefotaxime, respectively. Average recoveries for the analytes were 78% (I) and 88% (II) from both matrices. Linear responses were observed over a wide range (0.58-940 microg/ml for (I) in plasma, 0.80-55.8 microg/ml for (I) in CSF, 0.54-148 microg/ml for (II) in plasma and 0.50-36.0 microg/ml for (II) in CSF).
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Department of Pharmacology, University of the Orange Free State, Bloemfontein, Republic of South Africa.
Hundt
A F
AF
Swart
K J
KJ
Hundt
H K
HK
D002439:Cefotaxime / Q000031:analogs & derivatives / Q000097:blood* / Q000134:cerebrospinal fluid*; D002511:Cephalosporins / Q000097:blood* / Q000134:cerebrospinal fluid*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D002511:Cephalosporins; C029281:desacetylcefotaxime; D002439:Cefotaxime