Infrared Energy Absorption is used in breath analysis to detect which condition?

Infrared Energy Absorption is used in breath analysis to detect which condition?

• A. Deep lung alcohol
• B. Blood sugar
• C. Mouth alcohol
• D. Water vapor

Answer: (C)

Infrared energy absorption works by directing IR radiation through the breath sample and measuring which wavelengths are absorbed by the molecules present. Ethanol has specific absorption bands in the infrared, so this method can detect and quantify alcohol in the breath. In practice, this technique helps identify mouth alcohol contamination, which occurs when alcohol is present in the mouth rather than in the deep lungs and can falsely elevate the reading. By detecting ethanol early in the exhale, infrared analysis can indicate that the sample may not reflect true deep-lung alcohol levels, prompting a repeat or a purge to obtain an accurate result. Water vapor and blood sugar aren’t the primary targets of this specific breath analysis, and while deep-lung alcohol is the ultimate measurement goal, infrared detection of mouth alcohol is the condition that this method specifically helps uncover.

Infrared energy absorption works by directing IR radiation through the breath sample and measuring which wavelengths are absorbed by the molecules present. Ethanol has specific absorption bands in the infrared, so this method can detect and quantify alcohol in the breath. In practice, this technique helps identify mouth alcohol contamination, which occurs when alcohol is present in the mouth rather than in the deep lungs and can falsely elevate the reading. By detecting ethanol early in the exhale, infrared analysis can indicate that the sample may not reflect true deep-lung alcohol levels, prompting a repeat or a purge to obtain an accurate result. Water vapor and blood sugar aren’t the primary targets of this specific breath analysis, and while deep-lung alcohol is the ultimate measurement goal, infrared detection of mouth alcohol is the condition that this method specifically helps uncover.