What does a chain of custody in a laboratory ensure?

A chain of custody in a laboratory is a crucial protocol that ensures the integrity and accountability of sample handling. It involves a documented process that tracks the handling of samples from the moment they are collected until the results are reported. This process is essential for maintaining the assurance that the sample has not been tampered with, altered, or contaminated at any point along the way.

By documenting who handled the sample, when it was handled, and the conditions under which it was analyzed, laboratories can provide a verifiable record that supports the reliability of the data generated. This is particularly important in regulatory contexts or legal situations where evidence from laboratory analysis may be scrutinized.

While transparency in operations, efficiency in testing procedures, and reduction in contamination are all important aspects of laboratory work, they do not capture the primary function of the chain of custody as effectively as ensuring integrity and accountability. The chain of custody specifically emphasizes the importance of maintaining the link between the sample and its analysis, which is critical for the validity of any lab results.