An automated high-performance liquid chromatography (HPLC)/mass spectrometry instrument coupled on-line with a microdialysis probe is described for the analysis of contrast agents in biological fluids. This system is used for pharmacokinetic and structure elucidation studies of contrast agents used in X-ray and magnetic resonance imaging investigations. Additionally an LC/MS system for the direct analysis of urine, that obviates the need for conventional sample clean-up, is described.
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Michélsen et al. (1994) studied this question.
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