一,内标法不用准确定容:
证明:(以铅和钇为例)使用内标法时,
根据是:铅与钇的发射强度比正比于铅与钇的浓度比,即
I(Pb)/I(Y) 正比于 C(Pb)/C(Y)(1)
校准曲线的方程可以写成:
C(Pb)/C(Y)=k*[I(Pb)/I(Y)]+b(2)
Cd | Cr | Hg | Pb | Y |
228.802 | 267.716 | 184.950 | 220.353 | 371.030 |
样品 | 镉回收率 | 汞回收率 | 铅回收率 |
L-1 | 97.5% | 96.3% | 103% |
L-2 | 96.8% | 102% | 99.4% |
H-1 | 100% | 102.5% | 98% |
H-2 | 98% | 100.5% | 95% |
样品 | 镉回收率 | 铬回收率 | 汞回收率 | 铅回收率 |
PP-B-S-1 | 95.9% | 99.9% | 95.9% | 98.7% |
PP-B-S-2 | 93.5% | 102% | 90% | 98.9% |
样品 | 镉回收率 | 铬回收率 | 汞回收率 | 铅回收率 |
GBW08404-1 | 94.03% | 101.47% | 81.98% | 106.01% |
GBW08404-2 | 87.52% | 101.27% | 74.29% | 111.84% |
GBW08405-1 | 92.28% | 136.07% | 60.21% | 97.29% |
GBW08405-2 | 93.69% | 102.74% | 90.65% | 99.47% |
EC681K-1 | 94.64% | 23.66% | 49.61% | 105.21% |
EC681K-2 | 94.31% | 26.01% | 119.57% | 93.16% |
样品 | 镉回收率 | 铬回收率 | 汞回收率 | 铅回收率 |
EC681K | 85.37% | 44.63% | 60.34% | 93.33% |
GBW08405 | 85.97% | 106.87% | 56.69% | 88.72% |
浓度比 | 228.802 | 205.552 | 184.95 | 220.353 | 371.03 | ||||
0.0078-0.0078 | 38.74667 | 9.489721 | 8.606441 | 1.408911 | 166.0966 | ||||
0.0156-0.0156 | 89.58138 | 28.26899 | 10.29024 | 3.844986 | 459.9077 | ||||
0.031-0.031 | 171.1219 | 67.4806 | 28.38911 | 12.45522 | 1455.935 | ||||
0.0625-0.0625 | 340.9281 | 135.5501 | 26.37037 | 32.19929 | 3301.357 | ||||
0.125-0.125 | 687.2916 | 277.757 | 49.8731 | 66.876 | 6782.147 | ||||
0.25-0.25 | 1365.973 | 556.8027 | 97.54121 | 135.2402 | 13776.61 | ||||
0.5-0.5 | 2744.223 | 1124.849 | 192.5739 | 270.5456 | 27868.12 | ||||
1-1 | 5611.717 | 2308.404 | 391.0419 | 559.1554 | 56704.58 | ||||
浓度比 | 228.802/371.030 | 205.552/371.030 | 184.95/371.030 | 220.353/371.030 | |||||
0.0078-0.0078 | 0.23328 | 0.05713 | 0.05182 | 0.00848 | |||||
0.0156-0.0156 | 0.19478 | 0.06147 | 0.02237 | 0.00836 | |||||
0.031-0.031 | 0.11753 | 0.04635 | 0.01950 | 0.00855 | |||||
0.0625-0.0625 | 0.10327 | 0.04106 | 0.00799 | 0.00975 | |||||
0.125-0.125 | 0.10134 | 0.04095 | 0.00735 | 0.00986 | |||||
0.25-0.25 | 0.09915 | 0.04042 | 0.00708 | 0.00982 | |||||
0.5-0.5 | 0.09847 | 0.04036 | 0.00691 | 0.00971 | |||||
1-1 | 0.09896 | 0.04071 | 0.00690 | 0.00986 |
浓度 | Cd | Pb | Cd/Pb |
0.01 | 248.4973373 | 18.47759277 | 13.44857744 |
0.02 | 311.6689303 | 24.09682042 | 12.93402718 |
0.03 | 374.8405233 | 29.71604806 | 12.61407716 |
0.04 | 438.0121163 | 35.33527571 | 12.39588789 |
0.05 | 501.1837093 | 40.95450336 | 12.23757263 |
0.06 | 564.3553023 | 46.57373101 | 12.11745957 |
0.07 | 627.5268953 | 52.19295866 | 12.02320986 |
0.08 | 690.6984883 | 57.81218631 | 11.94728192 |
0.09 | 753.8700813 | 63.43141396 | 11.88480651 |
0.1 | 817.0416743 | 69.0506416 | 11.83249938 |
0.2 | 1448.757604 | 125.2429181 | 11.56758104 |
0.3 | 2080.473534 | 181.4351946 | 11.46675836 |
0.4 | 2712.189464 | 237.6274711 | 11.41361919 |
0.5 | 3343.905394 | 293.8197475 | 11.38080548 |
0.6 | 3975.621324 | 350.012024 | 11.35852785 |
0.7 | 4607.337254 | 406.2043005 | 11.34241378 |
0.8 | 5239.053184 | 462.396577 | 11.33021619 |
0.9 | 5870.769114 | 518.5888535 | 11.32066197 |
1 | 6502.485044 | 574.78113 | 11.31297585 |
2 | 12819.64434 | 1136.703895 | 11.27791011 |
3 | 19136.80364 | 1698.62666 | 11.26604456 |
4 | 25453.96294 | 2260.549424 | 11.26007804 |
5 | 31771.12224 | 2822.472189 | 11.25648726 |
6 | 38088.28154 | 3384.394954 | 11.25408886 |
7 | 44405.44084 | 3946.317719 | 11.25237348 |
9 | 57039.75944 | 5070.163249 | 11.25008341 |
10 | 63356.91874 | 5632.086014 | 11.2492811 |