Problems of Forensic Sciences 1999 Vol. 40 (XL) 18-26
COMPARISON OF HIGH ALCOHOL CONCENTRATIONS DETERMINED IN BREATH AND BLOOD
Wojciech GUBAŁA1, Jerzy ŁABĘDŹ1, Dariusz ZUBA2
1Institute of Forensic Research, Cracow
2Faculty of Chemistry, Jagiellonian University, Cracow
Streszczenie
A comparison of blood alcohol concentrations in breath testing and in direct blood samples analysis was the aim of this study. The examined material were blood samples taken from 56 patients of Sobriety Chamber in Cracow whose alcohol concentration estimated in breath testing exceeded 3‰. The absolute differences between an indication of a breath analyser and a result of chromatographic analysis ranged from - 0.83‰ to 1.37‰, while a relative difference of these values varied between - 18.6% and 54.6% with patients. For high alcohol concentrations, there was not correlation (r = 0.252; p > 0.05) between the results obtained by breath testing and by direct blood analysis. For the examined group of people, a calculated mean value of blood/breath ratio was 2063:1, a standard deviation of this value was 230.3 and a coefficient of variation amounted to 11.2%.
Słowa kluczowe
Blood/breath ratio; High alcohol concentration.