Comparative regression analysis of concurrent elimination-phase blood and breath alcohol concentration measurements to determine hourly degradation rates

Forensic Science International : Synergy
K JachauH Wittig

Abstract

Following the introduction of limit values for blood alcohol and breath alcohol concentrations of 0.5 g/kg and 0.25 mg/L, respectively, as provided under s. 24 a of the German Road Traffic Act the question is whether also breath alcohol concentrations can be back calculated to the time of the traffic offence in cases where it is definite that the person to be examined is in the period of alcohol elimination. To this end, a study was performed in which 56 healthy volunteers consumed 0.5, 0.8 and 1.0 g of ethanol mixed with fruit juice per kilogram of body weight over a period of 10-20 min. Calculations included all 391 pairs of concurrent blood alcohol and breath alcohol concentration values obtained after 2 h following the end of drinking. All volunteers exceeded the peak value of the alcohol curve. The measured values included were above 0.1 g/kg and 0.05 mg/L. For an average intake of alcohol of 0.88 g/kg the following regression lines were calculated for the period starting 2 h after the end of drinking: blood alcohol concentration [g/kg] = 1.318 - 0.172 h and breath alcohol concentration [mg/L] = 0.589 - 0.079 h. Subtracting the simple standard deviation from the mean value yielded hourly degradation rates above 0.1 g/kg an...Continue Reading

References

Nov 1, 1978·Journal of Studies on Alcohol·A W Jones
Dec 1, 1995·European Journal of Clinical Chemistry and Clinical Biochemistry : Journal of the Forum of European Clinical Chemistry Societies·D A Labianca, G Simpson
Dec 31, 2002·Forensic Science International : Synergy·Rod G Gullberg
Apr 12, 2003·Forensic Science International : Synergy·A W Jones, L Andersson
Jan 28, 2004·Alcoholism, Clinical and Experimental Research·Yehuda D NeumarkT K Li

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Citations

Apr 15, 2008·Forensic Science International : Synergy·Dariusz Zuba
Oct 27, 2006·Forensic Science International : Synergy·Marion PavlicWalter Rabl
Jun 15, 2005·Analytical Chemistry·T A BrettellR Saferstein

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