Sample preparation involves grinding, pelletizing, or other processing techniques. Here are the specific details for powder samples:

Powder Sample: It is preferable to have the samples as fine as possible. Most samples require grinding for approximately twenty minutes to achieve the desired particle size.

Powder Pelletizing: For samples that require direct pelletizing for testing, it is essential that they possess good flowability, lubricity, and compressibility. The pellets should have a circular shape with a diameter of more than 6mm and a thickness of approximately 1mm. Ensuring these dimensions helps ensure accurate and reliable test results.

It's crucial to follow these guidelines carefully during sample preparation as they significantly impact the quality and reproducibility of the subsequent testing.