How is alcohol expressed in blood?

How is alcohol expressed in blood?

• A. Grams per 100 milliliters of whole blood
• B. Percent by volume
• C. Grams per deciliter
• D. Milligrams per liter

Answer: (A)

The main idea is that blood alcohol concentration is a mass-per-volume measurement. In practice, alcohol in blood is reported as grams of ethanol per 100 milliliters of blood. This unit, often read as grams per deciliter, is the standard way BAC is expressed in the U.S. and in forensic testing because it directly ties the amount of alcohol to a specific volume of blood. While percent by volume or other units like milligrams per liter are used in other contexts, they are not the typical reporting standard for blood intoxication levels. Therefore, expressing alcohol in blood as grams per 100 milliliters is the best choice.

The main idea is that blood alcohol concentration is a mass-per-volume measurement. In practice, alcohol in blood is reported as grams of ethanol per 100 milliliters of blood. This unit, often read as grams per deciliter, is the standard way BAC is expressed in the U.S. and in forensic testing because it directly ties the amount of alcohol to a specific volume of blood. While percent by volume or other units like milligrams per liter are used in other contexts, they are not the typical reporting standard for blood intoxication levels. Therefore, expressing alcohol in blood as grams per 100 milliliters is the best choice.