b sample

Home » Resources » Dictionary » Terms

Definition - What does b sample mean?

A B Sample is the second part of a split specimen taken from a biological specimen, usually urine, oral fluid, or blood, collected from a person who is being tested for drugs. The purpose of the B Sample is to prove the accuracy of the A Sample result. If the A Sample tests positive for drugs or tampering, the donor may request the B Sample be tested at a different laboratory if they disagree with the results of the A Sample testing.

SureHire explains b sample

An employer may instruct an employee to be tested for the presence of drugs either as a pre-employment condition, as a result of reasonable suspicion, following a workplace accident, or as part of a random testing program. When an employee is tested for drugs, a biological sample (usually urine or oral fluid but athletic industry entities often require blood) is taken and split into two containers - one is marked as the A Sample while the other is marked as the B Sample and secured for possible confirmatory testing if needed.

Subscribe to SureNews!

Get your Reasonable Suspicion Checklist! Join our community and get access to more resources like this! Emails are sent monthly, so no need to worry, we will not fill up your inbox.