| Method |
LMT taken,
µg mL-1 |
Intra-day accuracy and precision
(n=7) |
Inter-day accuracy and precision
(n=5) |
LMT
found ± CL,
µg mL-1 |
%RE |
%RSD |
LMT
found ± CL,
µg mL-1 |
%RE |
%RSD |
| A |
1.0
3.0
5.0 |
0.99 ± 0.04
3.05 ± 0.12
4.98 ± 0.11 |
1.0
1.67
0.4 |
1.52
1.65
0.89 |
1.01 ± 0.03
3.03 ± 0.07
4.96 ± 0.14 |
1.0
1.0
0.8 |
0.98
0.86
1.02 |
| B |
4.0
8.0
12.0 |
4.05 ± 0.19
8.12 ± 0.24
12.02 ± 0.46 |
1.25
1.5
0.12 |
1.96
1.23
1.56 |
4.03 ± 0.17
7.98 ± 0.32
11.86 ± 0.65 |
0.75
0.25
1.17 |
1.55
1.46
1.99 |
%RE. Percent relative error, %RSD. relative standard deviation and CL. Confidence limits were calculated from: CL= ± tS/√n. (The tabulated value of t is 2.45 and 2.77
for six and four degrees of freedom respectively, at the 95% confidence level; S=standard deviation and n=number of measurements). |
