High-performance liquid chromatographic determination of iothalamic acid in human plasma and urine. |
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| Authors: | F Gaspari L Mainardi P Ruggenenti G Remuzzi |
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| Institution: | Mario Negri Institute for Pharmacological Research, Laboratory of Clinical Pharmacokinetics, Bergamo, Italy. |
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| Abstract: | A simple, rapid and sensitive method for the determination of iothalamic acid (IA) in both plasma and urine is reported. After extraction with ethyl acetate, IA was determined by strong anion-exchange high-performance liquid chromatography with ultraviolet detection at 254 nm. The lower limit of detection was 0.5 micrograms/ml. The average recovery was 73 and 57% from plasma and urine, respectively. Linearity was found over the investigated concentration range (up to 500 micrograms/ml for plasma and up to 10.0 mg/ml for urine). The reproducibility of the technique was good (coefficient of variation less than 6%) as was the precision and accuracy (coefficient of variation less than 2.5%). No interference from endogenous substances or any of the common drugs tested was found. |
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