Schoknecht G
Bundesgesundheitsamt, Institut für Sozialmedizin und Epidemiologie.
Blutalkohol. 1990 May;27(3):145-53.
Breath- (BrAC) and blood-alcohol concentrations (BAC) of 42 persons are compared in a drinking experiment under conditions which approach the situation in practice. Breath-alcohol determinations consisted in double measurements and included the determination of temperature of expired air. The measured BrAC was related to a temperature of 34 degrees C and was interpolated to the time when the blood sample was taken. According to the fact that in most cases the resorption of alcohol was not yet finished, the BrAC converted by a factor 2.1 to blood equivalent values were remarkably higher than the corresponding BAC values. If only these values are taken into consideration which are measured in the period of more than 20 minutes after drinking was stopped, the converted BrAC values differ not more than +20% from BAC values.
在接近实际情况的条件下进行的一项饮酒实验中，对42人的呼气酒精浓度（BrAC）和血液酒精浓度（BAC）进行了比较。呼气酒精测定采用双份测量，并包括对呼出气体温度的测定。测得的BrAC与34摄氏度的温度相关，并内插到采集血样的时间。由于在大多数情况下酒精的吸收尚未完成，通过乘以2.1的系数将BrAC转换为血液等效值后，其值明显高于相应的BAC值。如果仅考虑在停止饮酒20分钟以上时间段内测得的值，转换后的BrAC值与BAC值的差异不超过±20%。
