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ARCHIVED - Elisa Systems Casein Kit Evaluation: Summary of Results for Individual Laboratories and Averages for all labs

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Cereal Samples

Lab 1 Cereal Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.0 0.0 0.0
4 ppm 4 3.9-7.4 6.2 0.9
10 ppm 10 12.9-15.1 13.9 0.6
Lab 2 Cereal Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.4 0.1 0.2
4 ppm 4 1.7-4.5 3.0 0.9
10 ppm 10 4.6-10.8 7.3 2.0
Lab 3 Cereal Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.2 0.0 0.1
4 ppm 4 4.2-5.0 4.7 0.3
10 ppm 10 5.1-18.4 11.0 4.2
Lab 4 Cereal Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.3 0.1 0.1
4 ppm 4 3.6-5.3 4.5 0.5
10 ppm 10 8.1-15.0 12.5 2.2
Cereal Results for all four labs
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.4 0.1 0.1
4 ppm 4 1.7-7.4 4.7 1.3
10 ppm 10 4.6-18.4 11.2 2.8

* based on designated reference material
** based on the kit calibrators

Cookie Samples

Lab 1 Cookie Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.1 0.0 0.1
2 ppm 2 1.5-1.8 1.7 0.1
5 ppm 5 3.5-4.9 4.2 0.4
Lab 2 Cookie Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.1 0.0 0.1
2 ppm 2 1.3-2.1 1.6 0.3
5 ppm 5 3.7-5.4 4.4 0.6
Lab 3 Cookie Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.3 0.1 0.1
2 ppm 2 1.3-2.0 1.6 0.2
5 ppm 5 3.0-4.6 3.9 0.5
Lab 4 Cookie Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.2 0.1 0.1
2 ppm 2 1.6-2.3 2.0 0.2
5 ppm 5 2.2-4.8 3.4 0.9
Cookie Results for all four labs
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.3 0.1 0.0
2 ppm 2 1.3-2.3 1.7 0.2
5 ppm 5 2.2-5.4 4.0 0.4

* based on designated reference material
** based on the kit calibrators

Dark Chocolate Samples

Lab 1 Dark Chocolate Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.1-0.2 0.1 0.0
2 ppm 2 1.5-1.7 1.6 0.1
5 ppm 5 3.5-4.8 4.0 0.4
Lab 2 Dark Chocolate Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.1-0.5 0.2 0.1
2 ppm 2 1.3-2.4 1.9 0.4
5 ppm 5 2.4-5.8 3.8 1.3
Lab 3 Dark Chocolate Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.2 0.0 0.2
2 ppm 2 1.5-1.9 1.7 0.1
5 ppm 5 3.8-4.1 3.9 0.1
Lab 4 Dark Chocolate Results
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.1 0.0 0.1
2 ppm 2 1.3-1.5 1.5 0.1
5 ppm 5 3.0-4.2 3.6 0.5
Dark Chocolate Results for all four labs
Spiking level* Expected Result** Range of Results Average Std Dev.
Blanks   0.0-0.5 0.1 0.1
2 ppm 2 1.3-2.4 1.7 0.2
5 ppm 5 2.4-5.8 3.8 0.2

* based on designated reference material
** based on the kit calibrators

Z -Scores for each Set of Samples

Commodity Spiking Level*
ppm		 Expected Results**
ppm		 Lab # Z-Score
Cereal 0 0 1 -1.02
2 1.37
3 -0.22
4 -0.12
Cereal 2 2 1 1.20
2 -1.24
3 0.08
4 -0.05
Cereal 5 5 1 0.96
2 -1.36
3 -0.07
4 0.47
Commodity Spiking Level*
ppm		 Expected Results**
ppm		 Lab # Z-Score
Cookie 0 0 1 -0.31
2 -0.48
3 0.24
4 0.55
Cookie 2 2 1 0.00
2 -0.80
3 -0.60
4 1.41
Cookie 5 5 1 0.50
2 1.00
3 -0.20
4 -1.31
Commodity Spiking Level*
ppm		 Expected Results**
ppm		 Lab # Z-Score
Dark Chocolate 0 0 1 0.18
2 1.34
3 -0.80
4 -0.72
Dark Chocolate 2 2 1 -0.27
2 1.25
3 0.17
4 -1.16
Dark Chocolate 5 5 1 1.11
2 -0.37
3 0.46
4 -1.20

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