Metrology

Exercise 2: S/N estimation in chromatography

An illustration of the chromatogram obtained from ochratoxin A analysis (toxin produced by pathogenic moulds) is given below.

Question 1: The signal obtained is lower than the LOD of the method in one of the two cases shown below – which one?

Case A:
Case B:
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Question 2: What is the S/N ratio in the case in which the signal is higher than the LOD?

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