Laser-excited atomic-fluorescence spectrometry with electrothermal tube atomization.
The performance of graphite-tube electrothermal atomizers is evaluated for laser-excited atomic-fluorescence spectrometry for several elements. Three pulsed laser systems are used to pump tunable dye lasers which subsequently are used to excite Pb, Ga, In, Fe, Ir, and Tl atoms in the hot graphite tube. The dye laser systems used are pumped by nitrogen, copper vapour and Nd:YAG lasers. Detection limits in the femtogram and subfemtogram range are typically obtained for all elements. A commercial graphite-tube furnace is important for the successful utilization of the laser-based method when the determination of trace elements is intended, especially when complicated matrices may be present.
Vera
J A
JA
Chemistry Department, University of Florida, Gainesville, FL 32611, U.S.A.
Leong
M B
MB
Stevenson
C L
CL
Petrucci
G
G
Winefordner
J D
JD