AOAC GFA Stakeholder Program Meeting Book (March 15, 2023)

Recovery and precision ELISA kit A

Analyst 3

Analyst 1

Analyst 2

ppm Sesame

Sample ID

% Rec. g

RSD ppm f

% Rec. g

RSD ppm f

RSD ppm f

% Rec. g

Avg. OD ± SD e

Avg. OD ± SD e

Avg. OD ± SD e

Muffin b

M-0 d

0 5

0.001 ± 0.01 0.29 ± 0.02 0.48 ± 0.22 1.47 ± 0.05

0.01 ± 0.0003 0.20 ± 0.01 0.46 ± 0.03 1.24 ± 0.04 0.01 ± 0.002 0.06 ± 0.01 0.16 ± 0.02 0.56 ± 0.09 0.01 ± 0.01 0.21 ± 0.00 0.44 ± 0.07 1.31 ± 0.11 0.01 ± 0.0003 0.17 ± 0.02 0.36 ± 0.02 1.15 ± 0.10

0.004 ± 0.001 0.17 ± 0.02 0.41 ± 0.09 1.02 ± 0.21 0.02 ± 0.01 0.05 ± 0.02 0.13 ± 0.02 0.47 ± 0.09 0.005 ± 0.001 0.22 ± 0.00 0.49 ± 0.03 1.24 ± 0.06 0.003 ± 0.001 0.19 ± 0.01 0.35 ± 0.01 1.22 ± 0.07

7.0

6.1

5.5

M-5

5.9

139.70 115.13 110.81

2.5 5.5 3.5

121.17 131.69 116.09

9.8

109.73 136.63 117.87

11.5 33.2

13.2 34.8

13.7 35.4

M-10 M-30

10 30

46.0

20.9 20.8

3.4

Spice Mix

S-0 d

0 5

0.01 ± 0.0003 0.11 ± 0.02 0.19 ± 0.02 0.62 ± 0.03

2.7 4.6

1.9 4.6

1.6 4.0

S-5

15.2 10.5

53.32 46.01 48.35

16.0 11.7 15.4

38.64 46.25 53.37

23.8 16.8 17.8

31.22 40.13 52.23

S-10 S-30

10 30

14.5

16.0

15.7

4.9

Hummus c

S-0 d

0 5

0.005 ± 0.0004

(Day 1)

9.6

6.0

10.2 19.6 35.6

H-5

0.21 ± 0.01 0.43 ± 0.02 1.36 ± 0.10

3.8 5.7 7.2

192.53 172.69 126.03

1.4

119.69 123.03 121.34

1.7 6.0 4.6

204.57 196.14 118.77

17.3 37.8

12.3 36.4

H-10 H-30

10 30

15.6

8.7

Hummus c

S-0 d

0 5

0.01 ± 0.0002 0.19 ± 0.01 0.42 ± 0.00 1.10 ± 0.06

(Day 7)

5.6

5.8

5.7

H-5

4.5 0.9 5.8

111.01 120.31 103.44

11.0

115.09 120.08 122.71

4.6 2.6 5.6

113.76 105.10 121.22

12.0 31.0

12.0 36.8

10.5 36.4

H-10 H-30

10 30

5.1 8.8

RSD ≤24%, except one sample by one analyst (46%). Recoevery-31-204%, only four values by two analysts exceeded 150% recovery. All high recovery observed with hummus day 1 samples. Sesame recovery from spice mix was lower compared to others by all three analyst, few values below 50% recovery, limited to 31%. A slight reduction in recovery for day 7 hummus samples compared to Day 1, still within the acceptance criteria.

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