Pulverizing samples

ISO 17025 does not prescribe technical details regarding methods. In order to establish a suitable process and sample preparation procedure, you need to consider the performance capability of the pulveriser, your type of sample and the time it takes the operator to clean or prepare pulverising cups. Then you can do a mathematical calculation of the process capacity over 10 h.

For more information on ISO 17025 requirements, see the articles
What does ISO 17025:2017 require for laboratory measurement equipment and related procedures? at https://advisera.com/17025academy/blog/2019/07/25/iso-17025-measurement-requirements-of-the-standard/ and 
What is ISO 17025? at https://advisera.com/17025academy/what-is-iso-17025/