Spectrasol Applications
Sample Type: Reduction of ICP-MS
ArCl+Interference
|
 Preparation: |
Transfer 2 to 5 mls of an acid digested sample to a plastic tube.
Add 2 mls of 200 ng/mL Ge and 2 mls Spectrasol CFA-C (1+1).
Dilute to 10 mls with water.
|
| Results: |
Comparison of detection limits (pg/mL) for As and Se isotopes
with and without the use of the Spectrasol CFA-C tertiary amines
reagent. |
|
| Analyte |
without 10% |
with 10% |
Signal
|
|
CFA-C |
CFA-C |
Enhancement |
|
| 75As |
55 |
6.0 |
9x |
| 77Se |
0.43 |
0.10 |
4.3x |
| 78Se |
0.45 |
0.18 |
2.5x |
| 82Se |
0.90 |
0.28 |
3.2x |
|
| Discussion: |
Comparisons were done with an intermediate gas flow rate of 0.80
L/min, a nebulizer flow rate of 0.94 - 0.97 L/min and power of
1000 Watts. The 75As and 77Se isotopes which are most affected by ArCl+ exhibit the greatest signal enhancement.
|
| Reference: |
Krushevska, A. et al. Application of tertiary amines for As and
Se signal enhancement and polyatomic interference reduction in
ICP-MS analysis of biological samples. Fresenius J. Anal. Chem., 355, 793 (1996). |