Johnston CK, Lester GH. A simple procedure for the determination of carbamazepine in plasma by high pressure-liquid chromatography.
Ann Clin Biochem 1979;
16:213-6. [PMID:
533228 DOI:
10.1177/000456327901600150]
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Abstract
We describe a simple, rapid procedure for the estimation of carbamazepine in plasma. Protein is precipitated, and extraction is achieved by the addition of acetonitrile containing the internal standard N-acetyltryptophan ethyl ester. Separation is by reverse-phase high-pressure liquid chromatography with an acetonitrile: water mobile phase, and detection is by UV absorption at 280 nm. Total retention time is less than 7 minutes. Initial results gave within-batch and between-batch coefficients of variation of less than 2%, and mean recovery of 97%. The method is free from interference by other common anticonvulsant drugs.
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