几种头发消化方法的精密度比较(RSD) % | |||||
元素 | 组内精密度 | 组间精密度 | |||
方法I | 方法II | 方法III | 方法II | 方法III | |
Li | 10.5 | 16.0 | |||
B | 18.0 | 18.7 | 8.0 | 25.6 | 23.7 |
Na | 19.0 | 10.8 | 3.0 | 16.8 | 3.8 |
Mg | 5.0 | 9.7 | 4.2 | 10.2 | 6.2 |
Al | 16.0 | 11.3 | 8.6 | 16.0 | 19.5 |
P | 6.0 | 5.3 | 13.2 | 10.2 | 20.0 |
K | 16.0 | 12.6 | 12.3 | 29.7 | 15.0 |
Ca | 7.0 | 7.2 | 5.0 | 9.0 | 7.1 |
Cr | 26.0 | 19.4 | 12.5 | 23.1 | 15.4 |
Ti | 17.0 | 12.3 | 10.4 | 21.0 | 17.4 |
V | 24.0 | 10.7 | 7.3 | 18.9 | 8.1 |
Mn | 8.0 | 6.7 | 4.3 | 10.5 | 6.3 |
Fe | 47.0 | 13.3 | 9.7 | 20.2 | 11.4 |
Co | 24.0 | 10.5 | 7.2 | 17.2 | 8.4 |
Ni | 25.0 | 10.2 | 9.7 | 12.0 | 12.2 |
Cu | 20.0 | 6.9 | 4.1 | 7.7 | 5.7 |
Zn | 7.0 | 5.5 | 3.3 | 8.2 | 6.2 |
Ge | 60.0 | 13.9 | 18.0 | ||
As | 35.0 | 15.0 | 7.1 | 10.6 | 8.6 |
Se | 50.0 | 15.0 | 7.2 | 16.4 | 8.5 |
Rb | 8.9 | 9.0 | |||
Sr | 29.0 | 7.1 | 6.3 | 9.2 | 7.2 |
Zr | 31.0 | 8.0 | 4.1 | 16.0 | 5.6 |
Mo | 32.0 | 15.7 | 6.2 | 22.3 | 7.8 |
Ag | 24.0 | 11.3 | 8.0 | 14.9 | 10.6 |
Cd | 17.0 | 9.4 | 9.4 | 16.1 | 14.7 |
Sb | 19.0 | 14.0 | 6.6 | 16.0 | 11.0 |
I | 21.0 | 12.0 | 9.0 | 20.7 | 12.1 |
Ba | 9.0 | 8.7 | 9.1 | 8.4 | 9.6 |
Au | 7.7 | 10.8 | |||
Hg | 6.9 | 8.5 | 10.6 | 10.0 | |
Pb | 13.0 | 8.0 | 4.5 | 9.2 | 4.9 |
Bi | 7.0 | 6.5 | 28.0 | 8.0 | |
U | 10.0 | 6.8 | 22.0 | 6.3 |
注:1、I—消化方法,开口烧杯消化法,使用硝酸和过氯酸,ICP-AES测定:II—自动微波消化法,使用硝酸,ICP-MS测定,III—APLTMD消化法,使用硝酸ICP-MS测定
2、精密度,组内精密度—31只样本同1d内消化3次,当天测定,组内精密度—31只样本3d消化,消化当天测定