Food Authenticity Program Meeting Book (March 13, 2020)
Table A3: Expected Precision as a Function of Concentration-Reproducibility
Analyte (%)
Analyte Ratio
Unit (%, mg/kg)
%RSD % Mean Recovery
% PRSD r
100
1.0
100 %
1.3 1.9 2.7 3.7 5.3 7.3
98-102 98-102 97-103 95-105 90-107 80-110 80-110 80-110 60-115 40-120
2
10
10 -1 10 -2 10 -3 10 -4 10 -5 10 -6 10 -7 10 -8 10 -9
10 %
1
1 %
4 8
0.01
0.1 %
0.001
100 mg/kg (ppm) 10 mg/kg (ppm) 1 mg/kg (ppm) 100 g/kg (ppb) 10 g/kg (ppb) 1 g/kg (1ppb)
0.0001 0.00001
11
16
0.000001 0.0000001 0.00000001
15 21 30
32 45
PRSD R = 2C
-0.15 where C is expressed as a Mass fraction
15
Stakeholder Comments
Draft SMPRs were posted on AOAC web-site for Stakeholder comment(s).
8 General comment(s) including 2 Technical comments were received for the 3 Draft SMPRs.
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