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Evaluation of the Intoxilyzer 8000C Evidence Breath Alcohol Analyzer

NCJ Number
Canadian Society of Forensic Science Journal Volume: 44 Issue: 1 Dated: March 2011 Pages: 22-30
T. L. Martin
Date Published
March 2011
9 pages
The Intoxilyzer 8000C, an evidential breath alcohol analyzer, was evaluated according to the Recommended Standards and Procedures (2003) of the Canadian Society of Forensic Science Alcohol Test Committee (ATC).
The results of this testing demonstrated that the instrument met, or exceeded, the requirements of the ATC on all criteria, including accuracy, linearity, precision, and acetone interference. Human subject testing allowed for the comparison of blood alcohol concentrations (BACs) determined by the Intoxilyzer 8000C against near-simultaneous breath test results from an Intoxilyzer 5000C, a well-established, Approved Instrument in Canada since 1992. The results of 50 paired breath samples on 10 drinking subjects were sell-correlated (R2 = .968) and described by a linear model, y = 1.02x + 2.51. The validation of the Intoxilyzer 8000C according to the rigid standards of the ATC Equipment evaluation Procedure demonstrates the instrument to be an accurate and reliable means of determining breath alcohol concentrations over a range of forensically relevant BACs. Subsequent to this evaluation, the Intoxilyzer 8000C was added to the approved list of evidential instruments on August 29, 2007. (Published Abstract)