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In order to demand a person produce a breathalyzer sample an officer must have "reasonable suspicion" that the person drove with more than 80 mg alcohol per 100 mL of blood. [46] The demand must be within three hours of driving. Any driver that refuses can be charged under s.254 [46] of the Criminal Code.
Breath analysis can be done with various forms of mass spectrometry, but there are also simpler methods for specific purposes, such as the Halimeter and the breathalyzer. Gas chromatography-mass spectrometry GC-MS; Gas chromatography-UV spectrometry GC-UV; Proton transfer reaction mass spectrometry PTR-MS and PTR-TOF
Hair drug testing is a method that can detect drug use over a much longer period of time than saliva, sweat or urine tests. Hair testing is also more robust with respect to tempering. Thus, hair sampling is preferred by the US military [66] and by many large corporations, which are subject to Drug-Free Workplace Act of 1988.
More available drug tests using urine, saliva and hair can detect THC in the body for several days, weeks and even months. Yet, for those workplaces who do test for marijuana, positivity rates are ...
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DUI and alcohol-related crashes produce an estimated US$45 billion in damages every year. [ 3 ] With alcohol, a drunk driver 's level of intoxication is typically determined by a measurement of blood alcohol content or BAC; but this can also be expressed as a breath test measurement, often referred to as a BrAC.
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