电感耦合等离子体质谱法监测德阳市地下水中矿物质元素污染情况
冯吉 张竹阳 陈 红
德阳市食品药品安全检验检测中心;德阳市产品质量监督检验所
摘要:使用电感耦合等离子体质谱法监测地下水样品中26中矿物质元素的含量,结合统计软件进行聚类分析,可以方便的识别出不同地下水水源地的样品,进而判断出某地的地下水是否受到污染。实测结果表明,本法具有方便、快捷、可靠的特点,可以用于大批量地下水中矿物质元素污染情况的监测。表1 仪器工作参数
参数 | 设定值 |
Nebulizer Gas Flow | 0.85 |
Auxiliary Gas Flow | 1.2 |
Plasma Gas Flow | 18 |
ICP RF Power | 1150 |
Analog Stage Voltage | -1950 |
Pulse Stage Voltage | 1850 |
Discriminator Threshold | 12 |
Deflector Voltage | -8 |
Quadrupole Rod Offset | 0 |
Cell Entrance Voltage | -3 |
Cell Exit Voltage | -3 |
Cell Rod Offset | -15 |
Sweeps/Reading | 20 |
Reading/Replicate | 1 |
Replicates | 5 |
表2 26种元素的原子量、线性方程及相关系数
元素 | 原子量(amu) | 线性方程斜率 | 线性方程截距 | 相关系数 |
Ag | 106.905 | 15832.5 | -14659 | 0.999748 |
Al | 26.9815 | 27746.8 | -117672 | 0.979819 |
As | 74.9216 | 3081.44 | -12246.9 | 0.999206 |
Ba | 137.905 | 51452 | -31350 | 0.999979 |
Be | 9.0122 | 4274.68 | 716.302 | 0.999964 |
Bi | 208.98 | 24976.7 | -71801.1 | 0.990811 |
Ca | 42.9588 | 78.6003 | -30931.9 | 0.984038 |
Cd | 110.904 | 5659.65 | 1166.33 | 0.999944 |
Co | 58.9332 | 26731.8 | 7828.34 | 0.999916 |
Cr | 51.9405 | 24329.6 | -28328.1 | 0.999977 |
Cs | 132.905 | 66164 | 7381.17 | 0.999987 |
Cu | 62.9298 | 12672.5 | 5612.45 | 0.998835 |
Fe | 56.9354 | 600.884 | -14900.3 | 0.99949 |
Ga | 68.9257 | 20150.1 | -8978.68 | 0.999707 |
In | 114.904 | 64484 | -94725.1 | 0.999194 |
Li | 7.016 | 15006.5 | -58640.8 | 0.998719 |
Mg | 23.985 | 20372.4 | -2.36E+06 | 0.99982 |
Mn | 54.9381 | 33008.8 | 32761 | 0.998057 |
Ni | 59.9332 | 5787.34 | 551.359 | 0.999866 |
Pb | 207.977 | 23423.3 | -8061.57 | 0.999865 |
Rb | 84.9117 | 30497.2 | -8708.87 | 0.999925 |
Se | 81.9167 | 434.509 | -99.8028 | 0.999871 |
Sr | 87.9056 | 37179.7 | -87504.2 | 0.999855 |
U | 238.05 | 38232 | -14789.2 | 0.999872 |
V | 50.944 | 27329.4 | -176229 | 0.998436 |
Zn | 65.926 | 3798.46 | -2070.36 | 0.999584 |
表3 近似矩阵
1:旌阳和新镇 | 2:什邡冰川镇2# | 3:什邡冰川镇3# | 4:什邡冰川镇4# | 5:什邡冰川镇5# | 6:中江合兴乡 | 7:什邡雍城镇5# | 8:旌阳和新镇2# | 9:什邡冰川镇6# | 10:绵竹遵道镇 | 11:什邡莹华镇 | 12:旌阳区天元镇 | |
1:旌阳和新镇 | .000 | 8.339 | 9.211 | 10.597 | 10.081 | 9.457 | 11.088 | 12.741 | 11.564 | 12.950 | 14.658 | 7.922 |
2:什邡冰川镇2# | 8.339 | .000 | .199 | 1.515 | .584 | 4.722 | 1.229 | 4.905 | 1.616 | 8.254 | 7.169 | 3.213 |
3:什邡冰川镇3# | 9.211 | .199 | .000 | 1.287 | .209 | 4.686 | .881 | 4.522 | 1.263 | 8.829 | 7.259 | 3.983 |
4:什邡冰川镇4# | 10.597 | 1.515 | 1.287 | .000 | .777 | 4.957 | 1.362 | 4.500 | 1.568 | 8.864 | 7.077 | 5.266 |
5:什邡冰川镇5# | 10.081 | .584 | .209 | .777 | .000 | 4.929 | .742 | 4.574 | 1.038 | 9.292 | 7.546 | 4.812 |
6:中江合兴乡 | 9.457 | 4.722 | 4.686 | 4.957 | 4.929 | .000 | 3.379 | 2.183 | 3.790 | 4.744 | 2.517 | 4.617 |
7:什邡雍城镇5# | 11.088 | 1.229 | .881 | 1.362 | .742 | 3.379 | .000 | 2.048 | .080 | 7.764 | 5.093 | 4.911 |
8:旌阳和新镇2# | 12.741 | 4.905 | 4.522 | 4.500 | 4.574 | 2.183 | 2.048 | .000 | 2.069 | 6.216 | 2.673 | 7.167 |
9:什邡冰川镇6# | 11.564 | 1.616 | 1.263 | 1.568 | 1.038 | 3.790 | .080 | 2.069 | .000 | 8.150 | 5.400 | 5.550 |
10:绵竹遵道镇 | 12.950 | 8.254 | 8.829 | 8.864 | 9.292 | 4.744 | 7.764 | 6.216 | 8.150 | .000 | 1.768 | 6.518 |
11:什邡莹华镇 | 14.658 | 7.169 | 7.259 | 7.077 | 7.546 | 2.517 | 5.093 | 2.673 | 5.400 | 1.768 | .000 | 7.044 |
12:旌阳区天元镇 | 7.922 | 3.213 | 3.983 | 5.266 | 4.812 | 4.617 | 4.911 | 7.167 | 5.550 | 6.518 | 7.044 | .000 |