During a routine pre-employment drug screening, you collected a urine specimen from an applicant. After properly labeling the specimen, what is the MOST appropriate next step to ensure the integrity of the chain of custody?
Put the specimen into the general refrigerator until the courier arrives.
Secure the specimen in a tamper-evident bag and store it in the designated secure area.
Place the specimen on your desk while you complete the paperwork.
Ask a coworker to witness you placing the specimen in a regular plastic bag.
Ensuring that the specimen is secured in a tamper-evident bag is the correct next step after labeling, as it provides a clear indication if the specimen has been tampered with. This is an essential step in the chain of custody procedure which documents the control, transfer, and analysis of samples. This process helps protect the legal rights of the person being tested and the organization conducting the test. Leaving the specimen unattended or simply placing it in the general refrigerator without proper security measures could result in sample tampering, substitution, or challenging the validity of the test results. Having a witness is important, but the witness must be present during sample collection, not necessarily at this stage of securing the sample.
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