How does the Infrared Spectroscopy function in the Intoxilyzer 8000?

The Intoxilyzer 8000 employs infrared spectroscopy to measure the absorption of specific wavelengths of light by alcohol molecules present in a breath sample. This technique is based on the principle that different substances absorb infrared light at distinct wavelengths. When a breath sample is introduced into the device, the Intoxilyzer emits infrared light through the sample. As the light passes through, alcohol molecules in the breath sample absorb certain wavelengths, which indicates the presence and concentration of alcohol.

The device analyzes the infrared light that emerges from the sample after interacting with the alcohol molecules. By comparing the intensity of the emitted light to the light that was absorbed, the Intoxilyzer can accurately quantify the amount of alcohol present in the sample. This method is highly effective for detecting ethanol and provides reliable results, making it an essential feature of the Intoxilyzer 8000.

The other options do not accurately describe the operation of infrared spectroscopy within the device. Measuring temperature, analyzing chemical structures, and detecting physical states do not capture the fundamental mechanism and purpose of infrared spectroscopy in the context of breath alcohol testing.