In terms of alcohol concentration, how much alcohol is found in 100 ml of blood?

The correct answer is that the alcohol concentration in 100 ml of blood is equal to the alcohol in 210 L of air. This relationship is based on the established partition ratio between blood and breath, which is typically about 2100:1. This means that for every 1 ml of blood, it is expected to have the same amount of alcohol as 2100 ml of breath.

When you measure blood alcohol concentration, it is common to convert it to an equivalent measurement in breath to assess impairment for enforcement and legal purposes. The 210 L figure represents this conversion, indicating that a specific concentration of alcohol in blood correlates directly with a much larger volume of air.

This reflects how law enforcement uses tools such as the Intoxilyzer to estimate a driver's blood alcohol content (BAC) from breath samples by using the scientifically established ratios, allowing for accurate assessment during roadside tests and further medical evaluations.