主题：ICP-MS---DL

ICP-MS
The technique is best used for elements with masses greater than 80, mainly in the determination of rare earth elements (REE) and U, Th and Pb in geological materials. The instrument can analyse up to 30 samples per day. Normally we run batches of similar elements, e.g. Batch 1 REE; Batch 2 Transitions; Batch 3 Rb, Sr, Ba, Cs; Batch 4 U, Th, Pb. Therefore a typical 4 batch run for 30 samples requires 4 days of instrument time. The general internal standard used is 10 ppb indium, for U, Th, and Pb 10 ppb bismuth is used and for the REE 10 ppb of rhenium and ruthenium. Detection limits in ppb are listed in the table below. It is recommended, however, to work with concentrations at least 100 times the quoted detection limits for each element.


Element    Detection Limit
        ppb in solution
Li    0.13
Be    0.02
B    22.02
Sc    0.73
V    0.02
Cr    0.51
Co    0.02
Ni    0.31
Cu    0.27
Zn    0.26
Ga    0.01
Ge    0.08
As    0.005
Se    0.53
Br    0.67
Rb    0.01
Sr    0.02
Y    0.006
Zr    0.01
Nb    0.03
Mo    0.33
Ru    0.03
Rh    0.01
Pd   
Ag    0.0006
Cd    0.04
In   
Sn    0.09
Sb    1.30
Te    0.09
I    0.69
Cs    0.002
Ba    0.06
La    0.06
Ce    0.02
Pr    0.01
Nd    0.01
Sm    0.02
Eu    0.01
Gd    0.02
Tb    0.004
Dy    0.02
Ho    0.005
Er    0.01
Tm    0.005
Yb    0.03
Lu    0.01
Hf    0.004
Ta    0.004
W    0.95
Re   
Os   
Ir   
Pt   
Au    0.0002
Hg    1.28
Tl    0.04
Pb    1.23
Bi    0.004
Th    0.01
U    0.01