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Fonterra Co-operative Group
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Figure 3: Linearity and residuals plots for vitamin D
2
linearity experiment 3
Table 3: Variance of vitamin D
3
back-calculated concentrations
Standard Number
Variance
(1)
(%)
Experiment 1
Experiment 2
Experiment 3
1
25.0
55.8
79.4
2
5.6
0.4
11.9
3
-1.0
-1.8
-3.5
4
-1.3
-5.2
-1.3
5
0.4
3.8
-0.3
6
-0.1
-1.1
0.2
(1)
Variance of back-calculated concentration from regression against actual concentrations
Figure 4: Linearity and residuals plots for vitamin D
3
linearity experiment 1
y = 0.8624x + 0.0137
R² = 0.9998
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
0.0
2.0
4.0
6.0
8.0
Peak Area Ratio
Concentration Ratio
Linearity: Vitamin D
2
5
th
Jan 2016
-0.1
-0.05
0
0.05
0.1
0.0
2.0
4.0
6.0
8.0
Residuals
XVariable
Residual Plot: Vitamin D
2
5
th
Jan 2016
y = 1.4247x - 0.0479
R² = 1
0
5
10
15
20
25
30
35
40
45
0.0
10.0
20.0
30.0
Peak Area Ratio
Concentration Ratio
Linearity: Vitamin D
3
28
th
Dec 2015
-0.2
-0.1
0
0.1
0.2
0.0
20.0
40.0
60.0
Residuals
XVariable
Residual Plot: Vitamin D
3
28
th
Dec
2015
VitD-18 (February 2016)
FOR ERP USE ONLY
DO NOT DISTRIBUTE