Breath Alcohol, Ethanol, EtG & EtS


Breath Alcohol
A breath alcohol test determines the amount of alcohol in your blood by measuring the amount of alcohol in the air you breath out (exhale). An Evidential Breath Tester (EBT) measure alcohol concentration in the breath. EBT’s must meet NHTSA Conforming Products List (CPL). Only those devices on the CPL may be used in DOT alcohol testing. If an alcohol concentration of .020 or greater is found a “confirmation” test must be conducted following a minimum 15 minute observation period.

Ethanol (urine)
The detection of ethanol in a sample indicates that a person has likely been drinking, and the concentration present can give an indication of how severe the degree of ethanol toxicity is. Symptoms and complications may vary significantly from person to person, however, depending on the individual's general health, age, and other medications or drugs that he or she is taking. The ability to clear the alcohol out of the body also depends on the availability of the necessary enzymes and the functioning of the person's liver. For legal testing, results obtained are compared to legal allowable limits. Someone who chronically consumes significant amounts of ethanol can develop a tolerance to it and may show fewer toxicity symptoms and visible impairment at a specific blood alcohol level than someone who does not.

EtG & EtS
EtG is a direct metabolite of alcohol (ethanol). Its presence in urine may be used to detect recent ethanol ingestion, even after ethanol is no longer measurable. The presence of EtG in urine is an indicator that ethanol was ingested and can be detected in urine for up to 80 hours after ingestion. EtG is only evident when ethanol is ingested and is not produced as a result of fermentation. In addition to EtG, recent scientific studies have identified ethyl sulfate (EtS) as a second specific metabolite or biomarker of ethanol. For this reason, our lab tests and reports EtS, in conjunction with EtG, to confirm recent ethanol ingestion or exposure. The detection of EtG and EtS offers greater sensitivity and accuracy for determination of recent ethanol ingestion, than by detection of either biomarker alone.


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AccuScreen Systems
1038 Main Street
Baton Rouge, LA 70802