Abstract
The methods for barbiturate, opiate, methadone, and amphetamine have been modified for use with the American Monitor KDA. The modification, which incorporates automatic correction for endogenous lysozyme activity, was evaluated by comparing results obtained with the KDA for human urine samples containing known amounts of drug(s) with results obtained with the procedure recommended by Syva for the Gilford 3500. There was 98% agreement bewteen the two systems. Six calibrators and 40 samples can be assayed for all four drugs in about 2.5 h. The procedure has proven to be reliable for screening urine samples obtained from clients at a methadone treatment center.
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