标准溶液浓度/(μg/L) | 各元素10次回测标准溶液浓度回读平均值 | |||||||
Pb | Cd | Cu | Ni | Sb | As | Co | Cr | |
1.0 | 1.724 | 3.513 | 1.335 | 1.782 | -0.196 | 5.514 | 1.059 | 1.170 |
2.0 | 1.338 | 2.265 | 2.254 | 2.452 | -0.448 | 3.225 | 2.033 | 2.721 |
5.0 | 4.546 | 15.48 | 5.582 | 5.785 | 3.917 | 20.92 | 5.115 | 5.205 |
10 | 8.807 | 30.15 | 11.10 | 10.51 | 8.003 | 44.16 | 9.908 | 10.19 |
20 | 14.99 | 20.75 | 20.47 | 20.09 | 18.60 | 17.60 | 20.04 | 20.50 |
50 | 44.50 | 50.15 | 49.04 | 49.49 | 46.92 | 49.88 | 49.52 | 49.97 |
100 | 96.82 | 99.16 | 99.35 | 99.19 | 99.10 | 100.5 | 99.55 | 100.4 |
200 | 198.2 | 200.4 | 198.4 | 198.1 | 199.0 | 205.0 | 200.7 | 201.2 |
500 | 494.4 | 498.3 | 497.5 | 492.6 | 500.0 | 500.0 | 497.8 | 500.5 |
1000 | 1020 | 997.4 | 996.5 | 989.6 | 1002 | 1021 | 1002 | 1008 |
元素 | Pb | Cd | Cu | ||||||||||||
加标浓度ppb | 5 | 10 | 20 | 50 | 100 | 5 | 10 | 20 | 50 | 100 | 5 | 10 | 20 | 50 | 100 |
1 | 1.720 | 4.875 | 18.41 | 49.82 | 99.62 | 6.303 | 11.09 | 19.66 | 51.14 | 100.2 | 5.475 | 11.00 | 20.55 | 50.21 | 100.8 |
2 | 2.501 | 4.921 | 18.67 | 49.03 | 99.86 | 6.231 | 11.02 | 19.26 | 52.04 | 100.8 | 5.342 | 10.92 | 20.68 | 50.44 | 100.2 |
3 | 1.981 | 4.389 | 18.59 | 49.88 | 101.2 | 6.574 | 10.98 | 19.69 | 51.33 | 99.82 | 5.229 | 11.02 | 21.01 | 49.98 | 101.2 |
4 | 2.403 | 4.552 | 19.32 | 50.04 | 100.9 | 5.988 | 10.68 | 20.23 | 52.00 | 101.2 | 5.389 | 10.36 | 21.49 | 51.32 | 102.0 |
5 | 1.559 | 5.023 | 20.17 | 48.19 | 98.96 | 5.698 | 10.24 | 20.18 | 49.88 | 102.4 | 5.118 | 10.68 | 20.06 | 50.28 | 99.88 |
6 | 3.001 | 4.699 | 20.06 | 49.69 | 99.37 | 5.644 | 11.00 | 20.89 | 51.80 | 101.0 | 5.130 | 11.22 | 20.13 | 51.30 | 100.8 |
平均值 μg/L | 2.194 | 4.743 | 19.20 | 49.44 | 99.99 | 6.073 | 10.83 | 19.98 | 51.36 | 100.9 | 5.280 | 10.87 | 20.65 | 50.59 | 100.8 |
平均回收率 % | 43.9 | 47.4 | 96.0 | 98.9 | 100 | 121 | 108 | 99.9 | 103 | 101 | 106 | 109 | 103 | 101 | 101 |
标准偏差SD | 0.49 | 0.22 | 0.70 | 0.64 | 0.81 | 0.33 | 0.29 | 0.52 | 0.74 | 0.82 | 0.13 | 0.28 | 0.49 | 0.53 | 0.68 |
相对标准偏差RSD% | 22.3 | 4.6 | 3.6 | 1.3 | 0.8 | 5.4 | 2.7 | 2.6 | 1.4 | 0.8 | 2.5 | 2.6 | 2.4 | 1.0 | 0.7 |
元素 | Ni | Sb | As | ||||||||||||
加标浓度ppb | 5 | 10 | 20 | 50 | 100 | 5 | 10 | 20 | 50 | 100 | 5 | 10 | 20 | 50 | 100 |
1 | 5.664 | 11.36 | 21.45 | 54.58 | 102.0 | 5.426 | 8.857 | 20.28 | 49.00 | 99.14 | 11.38 | 13.67 | 22.77 | 56.37 | 98.65 |
2 | 5.921 | 11.23 | 21.69 | 53.29 | 103.2 | 5.249 | 8.951 | 20.42 | 49.28 | 98.65 | 8.963 | 14.23 | 21.49 | 55.20 | 98.86 |
3 | 5.687 | 11.59 | 21.02 | 56.10 | 100.8 | 5.821 | 8.792 | 21.11 | 47.89 | 100.2 | 12.37 | 16.89 | 23.20 | 53.49 | 101.3 |
4 | 5.269 | 10.89 | 20.88 | 52.24 | 105.6 | 5.196 | 9.031 | 19.68 | 50.30 | 100.8 | 14.02 | 11.69 | 20.88 | 51.88 | 102.0 |
5 | 5.884 | 11.02 | 21.00 | 51.99 | 99.27 | 5.553 | 9.145 | 21.32 | 48.88 | 101.2 | 9.210 | 12.45 | 21.89 | 56.10 | 96.88 |
6 | 5.102 | 11.42 | 20.46 | 50.69 | 100.3 | 5.097 | 9.221 | 20.06 | 49.35 | 100.2 | 14.23 | 15.50 | 23.12 | 54.12 | 99.64 |
平均值 μg/L | 5.588 | 11.25 | 21.08 | 53.14 | 101.8 | 5.390 | 9.000 | 20.48 | 49.12 | 100.0 | 11.70 | 14.07 | 22.22 | 54.52 | 99.56 |
平均回收率 % | 112 | 113 | 105 | 106 | 102 | 108 | 90.0 | 102 | 98.2 | 100 | 234 | 141 | 111 | 109 | 100 |
标准偏差SD | 0.30 | 0.24 | 0.40 | 1.78 | 2.08 | 0.24 | 0.15 | 0.57 | 0.71 | 0.89 | 2.08 | 1.75 | 0.87 | 1.56 | 1.70 |
相对标准偏差RSD% | 5.4 | 2.1 | 1.9 | 3.3 | 2.0 | 4.5 | 1.7 | 2.9 | 1.4 | 0.9 | 18 | 12 | 3.9 | 3.1 | 1.7 |
元素 | Co | Cr | ||||||||
加标浓度ppb | 5 | 10 | 20 | 50 | 100 | 5 | 10 | 20 | 50 | 100 |
1 | 4.938 | 9.824 | 21.06 | 51.07 | 100.4 | 5.102 | 11.28 | 20.97 | 52.28 | 102.4 |
2 | 4.992 | 9.882 | 20.88 | 50.89 | 100.2 | 4.812 | 12.21 | 20.23 | 51.32 | 103.6 |
3 | 5.014 | 9.621 | 22.10 | 50.66 | 100.8 | 4.905 | 10.68 | 21.69 | 50.89 | 101.2 |
4 | 5.221 | 10.21 | 20.47 | 52.14 | 102.1 | 5.088 | 9.960 | 22.10 | 52.64 | 100.8 |
5 | 4.866 | 10.62 | 21.23 | 51.26 | 101.8 | 4.882 | 9.421 | 21.36 | 51.23 | 104.5 |
6 | 4.958 | 9.786 | 21.14 | 51.68 | 100.3 | 5.303 | 11.36 | 20.45 | 53.14 | 103.8 |
平均值μg/L | 4.998 | 9.990 | 21.14 | 51.28 | 100.9 | 5.01 | 10.82 | 21.13 | 51.92 | 102.7 |
平均回收率% | 100 | 99.9 | 106 | 103 | 101 | 100 | 108 | 106 | 104 | 103 |
标准偏差SD | 0.11 | 0.33 | 0.49 | 0.50 | 0.75 | 0.17 | 0.93 | 0.66 | 0.67 | 1.37 |
相对标准偏差RSD | 2.2 | 3.3 | 2.3 | 1.0 | 0.7 | 3.4 | 8.6 | 3.1 | 1.3 | 1.3 |
目标元素 | 检测结果 | |||||||
人员1 | 人员2 | |||||||
1 | 2 | 平均值 | 相对标准偏差 | 1 | 2 | 平均值 | 相对标准偏差 | |
Pb | 99.62 | 99.86 | 99.74 | 0.1% | 101.2 | 100.9 | 101.0 | 0.1% |
Cd | 100.2 | 100.8 | 100.5 | 0.3% | 99.82 | 101.2 | 100.5 | 0.7% |
Cu | 100.8 | 100.2 | 100.5 | 0.3% | 101.2 | 102.0 | 101.6 | 0.4% |
Ni | 102.0 | 103.2 | 102.6 | 0.6% | 100.8 | 99.27 | 100.0 | 0.8% |
Sb | 99.14 | 98.65 | 98.90 | 0.2% | 100.2 | 100.8 | 100.5 | 0.3% |
As | 98.65 | 98.86 | 98.76 | 0.1% | 101.3 | 102.0 | 101.7 | 0.3% |
Co | 100.4 | 100.2 | 100.3 | 0.1% | 100.8 | 102.1 | 101.5 | 0.6% |
Cr | 102.4 | 103.6 | 103.0 | 0.6% | 101.2 | 100.8 | 101.0 | 0.2% |
元素 | Pb | Cd | Cu | Ni | Sb | As | Co | Cr |
加标浓度 (ppb) | 10 | 5 | 5 | 5 | 5 | 10 | 5 | 5 |
加标浓度 (mg/kg) | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 |
方法要求测定低限 | 0.23 | 0.01 | 0.06 | 0.05 | 0.09 | 0.20 | 0.02 | 0.12 |
次数 1 测定值 | 8.807 | 5.303 | 5.475 | 5.664 | 5.426 | 13.67 | 4.938 | 5.102 |
2 | 8.247 | 5.431 | 5.221 | 5.214 | 5.122 | 12.12 | 4.992 | 5.012 |
3 | 9.068 | 5.021 | 5.328 | 5.321 | 5.321 | 10.98 | 4.821 | 5.321 |
4 | 9.214 | 6.011 | 5.026 | 5.220 | 5.612 | 11.36 | 5.012 | 5.418 |
5 | 8.466 | 4.915 | 5.688 | 5.160 | 5.670 | 12.98 | 5.214 | 4.962 |
6 | 9.352 | 5.336 | 5.731 | 5.813 | 5.329 | 10.45 | 4.796 | 4.832 |
7 | 9.681 | 5.441 | 5.069 | 5.800 | 5.429 | 12.23 | 5.062 | 4.689 |
8 | 9.332 | 5.514 | 5.112 | 5.322 | 5.488 | 11.45 | 4.788 | 5.213 |
9 | 8.994 | 5.426 | 5.278 | 5.464 | 5.772 | 11.02 | 4.876 | 5.027 |
10 | 8.687 | 5.184 | 5.661 | 5.398 | 5.608 | 10.62 | 5.110 | 5.147 |
平均值/(ppb) | 8.985 | 5.358 | 5.359 | 5.438 | 5.478 | 11.69 | 4.961 | 5.072 |
标准偏差SD/(ppb) | 0.42 | 0.28 | 0.25 | 0.23 | 0.18 | 0.99 | 0.14 | 0.21 |
方法检出限3×SD/(ppb) | 1.26 | 0.84 | 0.75 | 0.69 | 0.54 | 2.97 | 0.42 | 0.63 |
方法检出限3×SD/(mg/kg) | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 | 0.06 | 0.01 | 0.01 |