Bonded phase of silica for solid phase extraction

Details Bonded phase of silica for solid phase extraction Bonded phase of silica for solid phase extraction

1986-02-20

1987-03-17

Doll, John

Catalyst, solid sorbent, or support therefor: product or process

Solid sorbent

Silicon containing

502401, 2101982, 210502, 55 67, 55386, B01J 2010, B01J 2022

Patent

active

046507841

ABSTRACT:
A bonded phase silica product of the formula: ##STR1## in which ##STR2## is the backbone of a silica gel or controlled pore glass, X is selected from --O--, --S--, ##STR3## each R and R.sup.1 are each independently selected from hydrogen, an alkyl group of from 1 to 3 carbon atoms and --CH.sub.2).sub.m COOR.sup.3, R.sup.2 and R.sup.3 are each independently alkyl of from 1 to 4 carbon atoms, n is an integer of from 2 to 5, p is zero or one and m is an integer of from 1 to 4, is suitable for use in solid phase extraction for cleanup of urine samples for analysis of cannabinoids.

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M. Elsohly et al., Analysis of the Major Metabolite of .DELTA..sup.9 -Tetrahydrocannabinol in Urine, Journal of Analytical Toxicology, vol. 7, Nov./Dec. 1983, pp. 262-264.
D. Black et al., Urine Cannabinoid Analysis: An Integrated Multi-Method Approach, Journal of Analytical Toxicology, vol. 8, Sep./Oct. 1984, pp. 224-227.

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