GB/T 21782.9-2010 "Coating powders — Part 9: Sampling" specifies the sampling methods for powder coatings from a delivery batch and the operational requirements for quantitatively subdividing the samples into other test samples as needed. It is applicable to personnel with sampling experience and qualifications. Sampling requires the use of tools such as sampling spoons made of non-sparking metal, chute-type sample dividers, full-flow rotary sample dividers, and sealed sample containers. The number of samples to be taken is determined based on the total number of packaging units, with the total amount of individual or mixed samples being no less than 2 kg, providing a fundamental guarantee for the accuracy of subsequent test results.