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NCJ Number: 77641 Find in a Library
Title: Breath Alcohol Sampling Simulator (BASS) for Qualification Testing of Breath Alcohol Measurement Devices
Author(s): A Flores; L K Eliason; Y C Wu
Corporate Author: US Dept of Commerce
National Bureau of Standards
Law Enforcement Standards Laboratory
United States of America
Date Published: 1981
Page Count: 30
Sponsoring Agency: National Institute of Justice/
Rockville, MD 20849
Superintendent of Documents, GPO
Washington, DC 20402
US Dept of Commerce
Washington, DC 20234
US Dept of Transportation National Highway Traffic Safety Admin
Washington, DC 20590
Publication Number: NBS-SP 480-41
Sale Source: Superintendent of Documents, GPO
Washington, DC 20402
United States of America

US Dept of Commerce
National Bureau of Standards
Law Enforcement Standards Laboratory
Washington, DC 20234
United States of America

National Institute of Justice/
NCJRS paper reproduction
Box 6000, Dept F
Rockville, MD 20849
United States of America
Document: PDF
Language: English
Country: United States of America
Annotation: This report describes a Breath Alcohol Sample Simulator (BASS) that was developed to provide an objective, reproducible mechanical substitute for human subjects in evaluating the performance of breath sample collecting systems for breath alcohol instruments.
Abstract: Prior to undertaking the design of BASS, researchers reviewed the results of earlier studies involving human subjects who had consumed alcohol to analyze the relationship of the ethanol concentration in a single breath (exhalation) as a function of time. These data were expanded upon during the current laboratory research with nondrinking human subjects in a series of experiments using individuals with a range of vital capacities and respiratory capability. The concentration of carbon dioxide as a function of exhalation time for single breath samples was monitored as each subject blew into three tubes of different flow resistance, which approximated the range of resistance offered by commercially available evidential breath testers. These data, combined with statistical data on the range of vital capacities of the U.S. driver population, serve to establish the parameters that must be controlled in order to ensure that the BASS can reproduce the extremes of single breath exhalations. Each of the essential parameters that must be controlled to produce a substitute for human breath is discussed, and the capability of the BASS to achieve that degree of control is described, together with the detailed design and operating characteristics of BASS. Data are presented that establish the need for a three-segment ethanol vapor concentration profile, in which the time and volume are controlled to produce a continuous sample that will allow the sample collection segment of breath analysis systems to be evaluated. Three specific BASS delivery cycles are recommended; these cover the range of vital capacities and flow rates that are encountered in the driving population and must be accommodated by an evidential breath tester to ensure that a sample of deep lung air is being used to analyze blood alcohol content (BAC). The report recommends that the BASS be incorporated into the National Highway Traffic Safety Administration standards for breath alcohol testing instruments to eliminate the need for human subjects to evaluate the breath-collecting capability of such instruments. Tables, diagrams, graphs, and footnotes are provided. A total of 12 references are appended. (Author abstract modified)
Index Term(s): Alcohol consumption analysis; Driving Under the Influence (DUI); Law Enforcement Standards Laboratory; National Highway Traffic Safety Administration; Police equipment; Standards
Note: Limited number of copies free from NBS.
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=77641

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