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Biomedical subjects

L A Clarke

Publications and source records attributed to L A Clarke.

40 records · Page 3Linked to original sources

Determination of sulthiame, tetrahydro-2-p-sulphamoyl-phenyl-2h-1,2-thiazine-1,1-dioxide, in plasma at therapeutic concentrations, using high-performance liquid chromatography.

A specific and sensitive liquid chromatographic method for the determination of sulthiame in small (0.5 ml) plasma samples is described. After adding an internal standard, a direct extract of the sample is examined by reversed-phase liquid chromatography with ultraviolet spectrophotometric detection. The method is rapid, simple and capable of determining plasma levels after therapeutic ingestion of sulthiame.

Anticonvulsants↗

Determination of valproic acid (dipropylacetic acid) in plasma by gas-liquid chromatography.

A specific and sensitive procedure for the determination of valproic acid at therapeutic concentrations in human plasma has been developed. The method involves a microscale extraction of the drug from acidified plasma into chloroform. Caproic acid is added as internal standard. The extract is subsequently analysed on a gas chromatography fitted with a flame ionisation detector, and quantitation achieved by the relative-peak-height technique.

Chromatography, Gas↗