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false positive Tag

02 March
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Drug Testing: How It Works

Posted by Clint
in Blog
Drug Testing: How It Works

In Oklahoma, both the state and private employers commonly use urine testing to check whether a person has used illegal drugs. Due to changes in legislation, many employers now mandate drug testing for their employees, leading to a large increase in the number of requested drug tests and likely an increase in the number of laboratories doing the testing. How exactly do these laboratories check for drugs in urine? First, a sample must be collected from the test subject, usually in a small cup. Labs then conduct an automated immunoassay test on the sample. The simplest type of immunoassay test works...

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23 February
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The Science Behind Blood Alcohol Urine Tests

Posted by Clint
in Blog
The Science Behind Blood Alcohol Urine Tests

Along with breath and blood tests, urine tests can be used by law enforcement officers to measure blood alcohol levels. Scientists have found that urine tests inaccurately measure concentrations of ethanol, but they do show whether alcohol is present. Urine tests can be unreliable for a number of other reasons, but law enforcement continues to use them as an alternative to the more typical breath and blood tests. Urine tests also can show the presence of other drugs besides alcohol. Like for blood testing, laboratories use gas chromatography-mass spectrometry (GC-MS) to detect ethanol levels in urine. Technicians run a sample through...

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