Quantitative GLC Determination of cis- and trans-Isomers of Doxepin and DESMETHYLDOXEPIN (cas 1225-56-5)

Add time:07/28/2019    Source:sciencedirect.com

A GLC method for the simultaneous quantitative determination of the cis- and irarrs-isomers of doxepin and desmethyldoxepin in human plasma was developed. The method involves the use of a capillary column for efficient separation of the four compounds and the internal standards, amitriptyline and nortriptyline. A high sensitivity is obtained with a nitrogen detector, enabling quantitation of the compounds in plasma of humans treated chronically with doxepin. Confirmation of the identity of the cis- and trans-isomers of doxepin and desmethyldoxepin in biological samples was carried out by selected ion monitoring.

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