Selecting the appropriate reference sample depends on several factors:
Purpose of the experiment: Determine what property needs to be measured or validated, such as size, surface area, or chemical composition. Instrument used: Ensure that the reference sample is compatible with the instrument and the measurement technique. Material properties: Consider the properties of the reference sample, such as stability, reactivity, and homogeneity, to ensure that it remains consistent over time. Certification and traceability: Choose reference samples that come with certification and traceability to national or international standards.
