Loss of Sensitivity in Flame Systems
In the S Series, M Series, iCE 3300, and iCE 3500 instruments, some atomic absorption methods using flame may measure low absorptions, which is also termed "loss of sensitivity". Use the actions outlined in this article to resolve loss of sensitivity.
Issue
Some Atomic Absorption methods produced by flame may measure low absorptions as compared to the default "cookbook" specification. This phenomena is called "loss of sensitivity".
Environment
- S Series
- M Series
- iCE 3300
- iCE 3500
Resolution
Use the table below to help rectify loss of sensitivity:
| CAUSE | ACTION |
| Incorrect flame conditions | Optimize flame conditions using the Wizard |
| Burner misalignment | Optimize burner using the Wizard |
| Incorrect position of impact bead | Optimize impact bead using the Wizard manually or manually |
| Reduced sample uptake rate |
Verify uptake rate is >4.5 mL/min; |
| Incorrect concentration of optimization solution | Make up fresh solution |
| Incorrect wavelength | Use cookbook default wavelength |
| Impact bead in wrong position | Align impact bead for maximum signal |