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 13

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

Table 1. SMPR for Formalin/Formaldehyde, Starch, Soy Protein in Raw bovine milk

Analytical Parameter

Acceptance Criteria for Formalin/ Formaldehyde

Acceptance Criteria for Starch

Acceptance Criteria for Soy Protein

Analytical Range (mg/L) ppm LOQ (mg/L) ppm Recovery

0.01 – 0.40

1.0 – 10

1.0 – 5

80-120 %

80-120 % 80-120 %

Accuracy

± 20%

± 20%

± 20%

RSD r RSD R

21 21

11 11

11 11