What essential information must be included on a sample label?

The inclusion of a unique sample number and the date of collection on a sample label is critical for several reasons. The unique sample number serves as a key identifier for tracking the sample throughout the testing process, ensuring that the results can be accurately assigned to the correct sample without confusion. This is particularly important in busy laboratory environments where numerous samples are processed simultaneously.

The date of collection is equally vital because it provides context for the sample, allowing analysts to assess the relevance of the data in relation to environmental conditions at the time of collection, potential degradation of the sample, and any changes that may have occurred. It also facilitates the establishment of a timeline for data collection, which is essential for regulatory compliance and reporting purposes.

In contrast, while sample characteristics and temperature, collector's name and sample type, and time of collection and sample volume can be important details, they do not encompass the core identifying information that ensures the sample can be managed correctly and linked to its results effectively. The unique sample number and collection date stand out as the fundamental elements that support accurate tracking and documentation in laboratory practices.