What is the primary purpose of chain-of-custody documentation for samples?

What is the primary purpose of chain-of-custody documentation for samples?

• A. To ensure the lab directory is complete.
• B. To identify the field crew.
• C. To log the cost of testing.
• D. To document who handled the sample and maintain chain of custody to ensure sample integrity and prevent tampering.

Answer: (D)

Documenting who handled the sample and maintaining a continuous record of custody is what protects the sample’s credibility from collection through analysis. By recording every transfer—who collected it, who transported it, who stored it, when, and under what conditions—you create an unbroken trail. This ensures the sample hasn’t been altered or tampered with and that the results are trustworthy, even if later reviewed or challenged. The other options miss this essential protection: a lab directory or identifying the field crew alone doesn’t guarantee a continuous custody trail, and logging costs has no bearing on sample integrity.

Documenting who handled the sample and maintaining a continuous record of custody is what protects the sample’s credibility from collection through analysis. By recording every transfer—who collected it, who transported it, who stored it, when, and under what conditions—you create an unbroken trail. This ensures the sample hasn’t been altered or tampered with and that the results are trustworthy, even if later reviewed or challenged. The other options miss this essential protection: a lab directory or identifying the field crew alone doesn’t guarantee a continuous custody trail, and logging costs has no bearing on sample integrity.