What are the differences between repeatability and reproducibility?

Similarity, repeatability and reproducibility are obtained from multiple measurements made on the sample. However, repeatability is characterized by the same measurement conditions, reflecting the stability of the current working status of the instrument and the working environment.

In contrast, the measurement conditions are different in the reproducibility test, which is used to evaluate the long-term stability of the instrument operation, the stability of the sampling method, and the operator's influence on the measurement results. The repeatability and reproducibility tests must be carried out regularly, ensuring that the instrument works properly.

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