Table 1: NIST SRM3275-2 (Fish oil standard)- Precision and Accuracy using the NIST fish oil standard, N = 24 over five different days and two different months. The mean ± 2σ represents the 95% confidence interval of measurements in our laboratory. The NIST lower and upper limits, and the NIST target, also represents the 95% confidence interval, but is based on the concentrations listed on the Certificate of Analysis. The upper limit was calculated using the highest denominator and the lowest numerator; the lower limit was calculated with the lowest numerator and highest denominator. The target was calculated simply by adding the values. Values are in µg unless otherwise specified.
|
|
ω-6 LA |
ω-3 ALA |
ω-6 AA |
ω-3 EPA |
ω-3 DHA |
ω-3 sum |
ω-6 sum |
ω-6/ω-3 |
|
Mean |
0.37 |
0.30 |
2.8 |
45.3 |
21.3 |
66.9 |
3.2 |
0.048 |
|
σ |
0.03 |
0.04 |
0.2 |
3.1 |
1.4 |
4.5 |
0.2 |
0.001 |
|
2σ |
0.06 |
0.08 |
0.4 |
6.2 |
2.8 |
9.0 |
0.4 |
0.002 |
|
CV |
8% |
13% |
6% |
7% |
7% |
7% |
6% |
2% |
|
Mean-2σ |
0.3 |
0.2 |
2.5 |
39.1 |
18.5 |
57.9 |
2.8 |
0.046 |
|
Mean+2σ |
0.4 |
0.4 |
3.2 |
51.5 |
24.1 |
75.9 |
36 |
0.050 |
|
NIST TARGET |
0.3 |
0.2 |
2.7 |
45.8 |
21.7 |
69.3 |
3.2 |
0.044 |
|
NIST LOWER |
0.3 |
0.2 |
2.5 |
43.8 |
20.8 |
64.8 |
2.8 |
0.040 |
|
NIST UPPER |
0.4 |
0.2 |
2.9 |
47.8 |
22.7 |
70.7 |
3.2 |
0.049 |