【Daily Question】Chemical Analysis Edition 2022.1.12
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When sampling randomly uneven materials, CA sampling and stratified sampling can be employed, with samples representative of each layer’s material taken as much as possible from layers with different characteristic values. B. Sampling should be conducted along the material flow line, at a frequency higher than the rate of change of the material’s properties; it is important that the sampling and the changes in property values do not occur simultaneously. C. Random sampling can be used, as well as non-random sampling. D. It can be performed at any location; care should be taken to avoid introducing impurities to prevent changes in the material.
C. Random sampling can be used, as well as non-random sampling.
C. Random sampling can be used, as well as non-random sampling.