SEARCH Specials Products TMS Availability Shipping Payment Returns Buying Online Quotes Your List Contact Us
SEARCH
Specials
Products TMS
Availability Shipping
Payment Returns
Buying Online Quotes
Your List
Contact Us
| FREE SHIPPING for any order that exceeds $50!!! |
 |
|
|
Donald R. Wilkinson, Ph.D.
Toxtrap, Inc.
1059 Horsepond Rd.
Dover, DE 19901
At the request of Mr. J. Robert Zettl, Forensic Consultants, Inc. 1500 East Mineral Place, Littleton, Co, Toxtrap, Inc. completed an evaluation of four batches of BreathScanŽ alcohol detectors consisting of twenty five tubes per batch. Each batch was designed to indicate a different alcohol level (0.02%, 0.04%, 0.08% and 0.10%). The test protocol used was similar to the protocol developed by Dr. David Cowan of Kings College London and used in a previous evaluation by Duo Research, Inc. in April 1992. This evaluation was carried out on December 22, 1999 and December 29, 1999.
The purpose of the evaluation was to measure effectiveness and reproducibility of the indicator color change at claimed alcohol concentration levels. On five separate occasions, five randomly selected tubes from each batch were exposed to its corresponding simulated breath containing either 0.02%, 0.04%, 0.08% or 0.10% alcohol. Readings were taken in one, two and three minutes following exposure.
Four different tube batches were evaluated:
A. Batch A081699 (0.02%)
B. Batch B040899 (0.04%)
C. Batch C061699 (0.08%)
D. Batch D060899 (0.10%)
SUMMARY OF RESULTS AFTER TWO MINUTES OF EXPOSURE:
In all cases 80% or more of indicator crystals produced a color change. At this level there is an obvious color change indicating presence of alcohol concentration no lower than the level tested.
CONCLUSIONS:
From this evaluation it was observed that each batch of breath alcohol detectors produced a maximum (95%) or near maximum (80%) color change within the prescribed two minutes of exposure to simulated breath alcohol concentrations at their labeled detection levels. These results support the manufacturer's claim that these devices are capable of detecting breath alcohol concentrations of 0.02% (Device A), 0.04% (Device B), 0.08% (Device C) and 0.10% (Device D).
BreathScanŽ is a disposable breath alcohol indicator intended to provide a reliable indication of alcohol present in exhaled breath of test subjects. The device is intended for use as a single, cost-effective breath alcohol screen and therefore need not meet the specifications expected of an evidential breath-testing device.
Twenty-five tubes from each of four batches were submitted for evaluation. Each batch was designed to test different breath-alcohol concentrations. The tubes were evaluated in groups of five on five individual occasions. The devices were evaluated at the value equivalent to the ethanol blood concentration stated on their label. (A concentration of 0.04% indicates an equivalent of 0.04 g. alcohol/100 mL blood, or 0.04 g alcohol/210 L breath.)
EXPERIMENTAL:
A simulator, thermostatically controlled at 34.0 +/- 0.1 degrees C, was used to produce constant samples of simulated breath alcohol concentrations of 0.02%, 0.04%, 0.08% and 0.10% (g alcohol/100 mL blood or g. alcohol/210 L breath) at a flow of 12 liters/minute. Standard simulator solutions were supplied by Toxtrap, Inc. Each device tested was attached to the simulator and the simulator's headspace blown through the device for ten seconds. The device was removed, shaken and observed one minute, two minutes and three minutes after exposure. The color of the crystals wee recorded after each observation. Observations were made in white light.
COMMENTS:
All readings are subjective. The color change was normally observed as a gradient along the tube. There were always some unchanged or more pale yellow crystals present in the device.
The tests described in this document are not intended to imply approval of Toxtrap, Inc. of the application of BreathScanŽ devices for blood ethanol determination.
SERVICES FOR >> Large purchasers Employers Parents Education Non-Profit Government
