Atomic Fluorescence Spectroscopy
There is an Analytical Chemistry A-Pages article to read for the atomic fluorescence spectroscopy section of class.
You should read "Sub-Part-per-Billion Analysis of Aqueous Lead Colloids by ArF Laser Induced Atomic Fluorescence" by S. K. Ho and coworkers before class on 11/02/09.
Discussion Questions:
1. What is colloidal lead?
2. Why is the spectral background significantly reduced when using atomic fluorescence compared to this group's earlier laser-induced plasma spectroscopy experiment?
3. The excitation wavelength is 193 nm while the main fluorescence is at 405.8 nm. Identify the type of fluorescence observed in this work.
4. Why does the colloid size influence the signal strength?
5. Why couldn't the authors use their original calibration curve when analyzing tap water? What advantage do they gain by using standard addition instead?
6. How would AES or AAS analysis of the lead colloid samples compare to the work presented herein?