Chemistry: analytical and immunological testing – Heterocyclic carbon compound – Diverse hetero atoms in same or different rings
Patent
1984-10-02
1987-03-24
Turk, Arnold
Chemistry: analytical and immunological testing
Heterocyclic carbon compound
Diverse hetero atoms in same or different rings
210656, 210 961, 210161, 210178, G01N 3002, G01N 3350
Patent
active
046525297
ABSTRACT:
Serum is passed through a column containing alkylated silica gel. The column is then washed with a mixture comprising from about 50 to 85 volume percent of an aqueous buffered medium of pH from about 3.5 to 5.0 and from about 15 to 50 volume percent of an organic solvent containing from 1 to 6 carbon atoms and from 1 to 5 heteroatoms selected from the group consisting of oxygen, nitrogen, and sulfur. The tricyclic antidepressant drug is removed from the column with an eluent mixture comprising from about 0 to 75 volume percent of an aqueous buffered medium of pH of about from 6 to 8 and from about 25 to 100 volume percent of one or more organic solvents containing from 1 to 6 carbon atoms and from 1 to 5 heteroatoms selected from the group consisting of oxygen, nitrogen, and sulfur. In this way, a tricyclic antidepressant drug sample, free from interfering metabolites, for use in assay determinations is obtained.
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Collins Christine G.
Jaklitsch Anna
Pankey Susan
Barrett Carole F.
Leitereg Theodore J.
Syntex (U.S.A.) Inc.
Turk Arnold
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