Samples must be properly labeled and marked to meet standards and should always have a ____________ for every sample collected?

Samples must be properly labeled and marked to meet standards and should always have a ____________ for every sample collected?

• A. Case File
• B. Label
• C. Barcode
• D. Chain of Custody

Answer: (D)

Maintaining the chain of custody ensures sample integrity and legal defensibility. It is the documented, chronological record of every person who handled the sample, every transfer, and all relevant dates, times, and locations. This trail proves that the sample analyzed is the same one that was collected and has not been altered or substituted along the way. While a label or barcode helps identify the sample, they do not on their own establish the sequence of custody or prevent tampering. A case file may contain related records, but the explicit documentation of who handled the sample and when is the essential element that accompanies every sample collected.

Maintaining the chain of custody ensures sample integrity and legal defensibility. It is the documented, chronological record of every person who handled the sample, every transfer, and all relevant dates, times, and locations. This trail proves that the sample analyzed is the same one that was collected and has not been altered or substituted along the way. While a label or barcode helps identify the sample, they do not on their own establish the sequence of custody or prevent tampering. A case file may contain related records, but the explicit documentation of who handled the sample and when is the essential element that accompanies every sample collected.