Recent analytical methods for cephalosporins in biological fluids

Area of Science:

• Analytical Chemistry
• Pharmacology

Background:

• Reverse-phase (RP) chromatography has been the primary analytical technique for cephalosporins since 1980.
• Methods commonly involve protein precipitation, with some using solid-phase isolation or extraction.
• The choice of method is dictated by analytical constraints and study objectives.

Purpose of the Study:

• To review analytical techniques for cephalosporin quantification.
• To discuss the suitability of different methods for pharmacokinetic studies versus therapeutic drug monitoring.
• To highlight the impact of sample preparation on method performance.

Main Methods:

• Review of established analytical techniques, primarily RP chromatography.
• Discussion of sample preparation methods: protein precipitation, solid-phase isolation, and extraction.
• Comparison of liquid chromatography (LC) with microbiological, enzymatic, and fluorimetric methods.

Main Results:

• RP chromatography offers selectivity, accuracy, and ease of use for cephalosporins.
• LC is preferred for pharmacokinetic studies due to its specificity and ability to distinguish metabolites.
• Simpler, less specific methods may be used for therapeutic drug monitoring if safety margins are wide and patient therapy is uncomplicated.

Conclusions:

• Method selection for cephalosporin analysis requires careful consideration of study objectives, required specificity, and sample throughput.
• Future advancements may enhance specificity and sensitivity through improved sample preparation and LC technologies.
• Balancing accuracy, specificity, and throughput is crucial for effective cephalosporin analysis in different clinical and research settings.