The concentration of alcohol is reported in which unit?

The concentration of alcohol is reported in which unit?

• A. In milligrams per deciliter of blood
• B. In grams per 210 liters of breath
• C. In parts per million of ambient air
• D. In grams per liter of urine

Answer: (B)

Breath testing uses a specific standard for reporting alcohol concentration: grams of alcohol per 210 liters of breath. This g/210 L unit is what instruments like the Intox EC/IR II display as the breath alcohol concentration (BrAC). It reflects the amount of alcohol in the exhaled air rather than in blood or urine, and it’s different from blood measurements (which use g/dL), ambient air (ppm), or urine (g/L). So, the concentration in this context is reported as grams per 210 liters of breath.

Breath testing uses a specific standard for reporting alcohol concentration: grams of alcohol per 210 liters of breath. This g/210 L unit is what instruments like the Intox EC/IR II display as the breath alcohol concentration (BrAC). It reflects the amount of alcohol in the exhaled air rather than in blood or urine, and it’s different from blood measurements (which use g/dL), ambient air (ppm), or urine (g/L). So, the concentration in this context is reported as grams per 210 liters of breath.