Compared with many breath-alcohol analyzers, the QED
test offers a somewhat different analytical selectivity and response
to potential interfering substances. This suggests that
a QED saliva-alcohol test furnishes an independent check on
the results from breath-alcohol analyzers. A high selectivity for
ethanol is demanded in connection with workplace alcohol
testing, where individuals might have been exposed to industrial
chemicals and organic solvents. In this study, the QED test
showed no false-positive results at the zero level when alcoholflee
human subjects were tested. However, tests should be
made with a much larger number of alcohol-free subjects, perhaps
several hundred, before this conclusion can be drawn. The
alcohol concentration threshold necessary for a positive response
with QED is approximately 10-15 mg/dL, as shown by
the x-intercepts in Figures 3 and 4.
Compared with many breath-alcohol analyzers, the QEDtest offers a somewhat different analytical selectivity and responseto potential interfering substances. This suggests thata QED saliva-alcohol test furnishes an independent check onthe results from breath-alcohol analyzers. A high selectivity forethanol is demanded in connection with workplace alcoholtesting, where individuals might have been exposed to industrialchemicals and organic solvents. In this study, the QED testshowed no false-positive results at the zero level when alcoholfleehuman subjects were tested. However, tests should bemade with a much larger number of alcohol-free subjects, perhapsseveral hundred, before this conclusion can be drawn. Thealcohol concentration threshold necessary for a positive responsewith QED is approximately 10-15 mg/dL, as shown bythe x-intercepts in Figures 3 and 4.
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