What information should always be included on a sample?

Including the date, time, and initials on a sample is essential because this information ensures accurate tracking and accountability throughout the analysis process. The date and time indicate when the sample was collected, which is crucial for assessing its relevance and stability, especially for parameters that may change over time. Initials provide a clear reference to the person who collected the sample, allowing for transparency and traceability in case any questions arise regarding the sample or its handling.

While sample location and volume, temperature and pH, and the type of analysis to be performed are also important pieces of information in certain contexts, they do not have the same foundational role in maintaining the integrity, reliability, and documentation of the sampling process as the date, time, and initials. Therefore, it is imperative to always include the date, time, and initials to ensure that the sample can be accurately and effectively analyzed and reported.