Published Online: 1 October 1985
Page Count: 6
Supervisor, Chemical Test for Alcohol Unit, Maryland State Police, Pikesville, MD
Chemist, O'Neil M. Banks, Inc., Bel Air, MD
Toxicologist, Office of the Chief Medical Examiner, Baltimore, MD
(Received 5 November 1984; accepted 28 January 1985)
Ninety Breathalyzer® instruments (Model 1000) and twenty instruments (Models 900, 900A) were studied using a protocol described by the Department of Transportation's “Standard for Devices to Measure Breath Alcohol.” Although the mean of each of three concentrations tested (0.05, 0.10, and 0.15 g/210 L) compared favorably in both series, the standard deviation was consistently higher for the Model 1000 instruments. The Model 1000 instruments also produced a significant number of test results which exceeded the normally expected scientific deviation.
Paper ID: JFS11046J