Retained samples

A retained sample, also known as a retention sample, is a sample of the original material that is retained for a period of time after analysis. There are several reasons why retention patterns are important in bulk material sampling:

1. Quality Control and Assurance: If there are questions or concerns about the accuracy or reliability of the original analysis, the retained sample can be re-analyzed to verify the original results.
2. Clarification of discrepancies: If there are discrepancies between the expectations and the analysis results, the retained sample allows for additional verification. This can be especially important if the sample is part of a commercial or litigation dispute.
3. Procedural change review: If there are improvements or changes in the analysis methods, the retained sample can be used to assess the impact of those changes.
4. Regulatory requirements: In some industries and regions, legal or regulatory requirements may mandate the retention of retained samples.
5. Research and development:  Retained samples can also be used for research and development work, for example to develop new analytical methods or to further investigate specific properties of the bulk material.