Microsoft PowerPoint - FINAL-AOAC StandardsDevDebpres8-2018

Table 4: Expected Precision (repeatability) as a Function of Analyte Concentration

Analyte % Analyte Ratio

Unit

RSD%

100

1

100%

1.3 1.9 2.7 3.7 5.3 7.3

10%

10

10 -1 10 -2 10 -3 10 -4 10 -5 10 -6 10 -7 10 -8 10 -9

1%

1

0.1%

0.01

100 ppm (mg/kg) 10 ppm (mg/kg) 1 ppm (mg/kg) 100 ppb (μg/kg) 10 ppb (μg/kg) 1 ppb (μg/kg)

0.001

0.0001 0.00001 0.000001 0.0000001 0.00000001

11 15 21 30