The Inadequacy of Mouth Alcohol Detection Systems in Breath Alcohol Testing

So-called "slope detectors" in breath alcohol analyzers don't always catch mouth alcohol.

Undetected mouth alcohol is a problem in breath alcohol testing.

Most modern breath alcohol analyzers are programmed to look for signs of a breath sample contaminated with alcohol that doesn’t come from the lungs.

However, the algorithm to detect mouth alcohol contamination isn’t perfect.