Chemistry-PTM-OMA_Modules_1-4

Analyzing Data – Quantitative Method SLV

Calculate for each concentration of each matrix: • Mean – the average result from replicate test portions • Repeatability (s r • Relative Standard Deviation of Repeatability (RSD r ) ‐ s r

) ‐ the standard deviation from replicate test portions

divided by the 

mean candidate method result  • Bias ‐ the difference between the mean candidate method result and  the true value (known fortification level or reference method result) • Recovery – the ratio of the mean candidate method result and the true  value (known fortification level or reference method result)