Calibration method | N˚ experiment | Spike concentration expected (µg・L−1) | Spike concentration observed (µg・L−1) | Yield (%) | Yields mean (%) | Recovery rate (%) | ||||
1 | 2 | 3 | 1 | 2 | 3 | |||||
Addition standard | 1 | 0.67 | 0.682 | 0.646 | 0.674 | 101.79 | 96.37 | 100.61 | 99.59 | 98.3 |
2 | 0.689 | 0.685 | 0.682 | 102.78 | 102.21 | 101.82 | 102.27 | |||
3 | 0.660 | 0.660 | 0.665 | 98.45 | 98.47 | 99.25 | 98.72 | |||
4 | 0.632 | 0.678 | 0.634 | 94.30 | 101.22 | 94.69 | 96.74 | |||
5 | 0.669 | 0.669 | 0.623 | 99.91 | 99.81 | 92.95 | 97.56 | |||
6 | 0.689 | 0.641 | 0.631 | 102.81 | 95.60 | 94.19 | 97.53 | |||
7 | 0.668 | 0.622 | 0.637 | 99.63 | 92.80 | 95.10 | 95.84 | |||
1 | 1.33 | 1.241 | 1.231 | 1.209 | 95.48 | 94.67 | 93.01 | 94.39 | 95.4 | |
2 | 1.226 | 1.275 | 1.230 | 94.27 | 98.08 | 94.60 | 95.65 | |||
3 | 1.247 | 1.286 | 1.298 | 95.88 | 98.95 | 99.82 | 98.22 | |||
4 | 1.219 | 1.153 | 1.221 | 93.78 | 88.68 | 93.95 | 92.13 | |||
5 | 1.202 | 1.221 | 1.203 | 92.47 | 93.91 | 92.53 | 92.97 | |||
6 | 1.254 | 1.275 | 1.272 | 96.49 | 98.07 | 97.88 | 97.48 | |||
7 | 1.246 | 1.273 | 1.271 | 95.81 | 97.94 | 97.75 | 97.17 | |||
1 | 2.43 | 2.205 | 2.229 | 2.207 | 90.73 | 91.72 | 90.82 | 91.09 | 93.1 | |
2 | 2.199 | 2.209 | 2.210 | 90.50 | 90.93 | 90.95 | 90.79 | |||
3 | 2.039 | 2.041 | 2.095 | 83.92 | 83.99 | 86.21 | 84.71 | |||
4 | 2.327 | 2.312 | 2.365 | 95.78 | 95.14 | 97.32 | 96.08 | |||
5 | 2.224 | 2.393 | 2.240 | 91.54 | 98.48 | 92.18 | 94.07 | |||
6 | 2.337 | 2.424 | 2.372 | 96.17 | 99.76 | 97.59 | 97.84 | |||
7 | 2.340 | 2.322 | 2.418 | 96.29 | 95.57 | 99.52 | 97.13 | |||
External calibration | 1 | 1.6 | 1.817 | 1.857 | 1.876 | 113.56 | 116.04 | 117.26 | 115.62 | 107.1 |
2 | 1.553 | 1.551 | 1.563 | 97.06 | 96.91 | 97.69 | 97.22 | |||
3 | 1.611 | 1.582 | 1.573 | 100.71 | 98.86 | 98.33 | 99.30 | |||
4 | 1.542 | 1.547 | 1.539 | 96.37 | 96.69 | 96.17 | 96.41 | |||
5 | 2.105 | 2.035 | 1.942 | 131.59 | 127.20 | 121.36 | 126.71 | |||
1 | 6.4 | 7.170 | 7.310 | 7.296 | 112.03 | 114.22 | 114.01 | 113.42 | 108.4 | |
2 | 6.723 | 6.767 | 6.675 | 105.05 | 105.74 | 104.30 | 105.03 | |||
3 | 6.270 | 6.283 | 6.268 | 97.97 | 98.16 | 97.94 | 98.02 | |||
4 | 6.485 | 6.478 | 7.247 | 101.33 | 101.22 | 113.24 | 105.26 | |||
5 | 7.825 | 7.444 | 7.856 | 122.26 | 116.31 | 122.75 | 120.44 |