Clinical Chemistry
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Clinical Chemistry 28: 2143-2148, 1982;
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Clinical Chemistry, Vol 28, 2143-2148, Copyright © 1982 by American Association for Clinical Chemistry

Liquid-chromatographic determination of amitryptyline and its metabolites in serum, with adsorption onto glass minimized

PM Edelbroek, EJ de Haas and FA de Wolff

To study correlations between the concentrations, in serum, of amitriptyline and its most important metabolites with clinical response in patients, we developed a "high-performance" liquid-chromatographic method for routine determination of amitriptyline, nortriptyline, total 10-hydroxy-amitriptyline, desmethylnortriptyline, and E(trans)- and Z(cis)-10-hydroxynortriptyline. These compounds are extracted from 1 mL of alkalinized serum into hexane/isoamyl alcohol (99/1 by vol). Perazine is the internal standard. To minimize irreversible adsorption of the drugs onto the glassware, 5 micrograms of maprotiline is added to the organic phase just before evaporation. After a 10-min resolution on a silica column eluted with acetonitrile/methanol/NH4OH (1 mol/L), absorbance is measured at 240 nm. Only chlorimipramine, doxepin, procainamide, and N-acetylprocainamide may interfere with assay of the compounds that probably are therapeutically relevant: amitriptyline, nortriptyline, and E-10-hydroxynortriptyline. Uremia, lipemia, and icterus also do not affect the analysis.


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 Hum Exp ToxicolHome page
C. Koppel, A. Wiegreffe, and J. Tenczer
Clinical Course, Therapy, Outcome and Analytical Data in Amitriptyline and Combined Amitriptyline/Chlordiazepoxide Overdose
Human and Experimental Toxicology, January 1, 1992; 11(6): 458 - 465.
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Copyright © 1982 by the American Association for Clinical Chemistry.