Drug screening
Question
Can a lab test a urine sample that is one week old and that has already been tested one time for a drug screening?
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2 weeks
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Answers ( 2 )
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The problem with that is real urine spoils quickly, in a matter of hours. It will go cloudy, and within 24 hours it will be stringy in appearance. So unless you’re going straight to the lab, you going to have to chill it or freeze it.