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Clinical Chemistry 36: 532-534, 1990;
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Clinical Chemistry, Vol 36, 532-534, Copyright © 1990 by American Association for Clinical Chemistry

Liquid-chromatographic determination of amiodarone and N- desethylamiodarone in serum

CN Ou, CL Rognerud, LT Duong and VL Frawley
Department of Pathology, Texas Children's Hospital, Houston 77030.

We have developed a stable and simple normal-phase liquid- chromatographic method for simultaneously measuring amiodarone and its metabolite, N-desethylamiodarone, within 8 min. The chromatographic system consists of a 15 cm x 3.9 mm Waters "Resolve" silica column and a mobile phase of ammonium sulfate (17 mmol/L, pH 6.8) and methanol (8/92 by vol), pumped at 1.8 mL/min and monitored at 254 nm. After 250 microL of serum is mixed with 100 microL of 0.36 mol/L NaH2PO4, 100 microL of the internal standard solution (L8040, 6 mg/L), and 200 microL of isopropyl ether, the mixture is vortex-mixed and centrifuged. Fifty microliters of the organic layer is injected onto the column. Relative recovery was 100% over the assay range of 0.1 to 20.0 mg/L for both compounds. Within-run and total (day-to-day) CVs were 3% and 7% for amiodarone and 5% and 8% for N-desethylamiodarone, respectively.




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Copyright © 1990 by the American Association for Clinical Chemistry.