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For example, a breathalyzer measurement of 0.10 mg/L of breath alcohol characterises approximately 0.0001×2251 g/L, or 0.2251 g/L of arterial blood alcohol concentration (equivalent to 0.2251 permille or 0.02251% BAC). [15] The ratio of venous blood alcohol content to breath alcohol content may vary significantly, from 1300:1 to 3100:1.
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 tampering. 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.
This version was a more compact, and easier to operate breath test machine, which produced reliable results concerning blood alcohol content. [2] A revolutionary invention that aided the ability of traffic enforcement officials’ to identify and prosecute drivers under the influence of alcohol.
If over the legal limit of 0.05g per 100 millilitres of blood, then a second breath test will be taken and used as evidence against the driver when charged with the offence. [36] If a person is suspected to be under the influence of an illegal drug, they will be required to supply a urine sample. [37]
The above photo shows the positive results of the number 2 Marquis reagent presumptive drug test when used with a sample of opium. It is the primary presumptive test used in Ecstasy reagent testing kits. It can also be used to test for such substances as opiates (e.g. codeine, heroin), and phenethylamines (e.g. 2C-B, mescaline).
Three high school students in Florida are breaking ground by creating straws that will be able to detect date rape drugs.
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