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

On this page:

• Cereal Samples
• Cookie Samples
• Dark Chocolate Samples
• Z -Scores for each Set of Samples

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