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What is the minimum amount of specimen needed for a conclusive drug test result?

April 26, 2017conclusive drug test minimum needed specimen

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What is the minimum amount of specimen needed for a conclusive drug test result?

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It is always important to collect a sufficient amount of specimen in case of a non-negative result. The confirmation laboratory requires a minimum of 15ml of specimen but prefers 30ml for urine drug testing. For saliva drug test, it is 2ml.