Laser-induced fluorescence with an OPO system. Part II: direct determination of lead content in seawater by electrothermal atomization-laser-excited atomic fluorescence (ETA-LEAF).
Fluorescence was induced by coupling a laser with an optical parametric oscillator (OPO) to develop an analytical method for the direct determination of lead content, at ultra-trace level, in seawater by electrothermal atomization-laser-excited atomic fluorescence (ETA-LEAF). The optimization of atomization conditions, laser pulse energy, and mainly temporal parameters allowed us to reach a 3 fg detection limit (0.3 ng L(-1)) despite the low repetition rate of the device. The expected error on predicted concentrations of lead, at trace levels, in seawater was below 15%.
Le Bihan
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A
UMR CNRS-UBO 6521, Faculté des Sciences et Techniques, 6 avenue Victor Le Gorgeu -BP 809, 29285 Brest, France. Alain.LeBihan@univ-brest.fr
Lijour
Y
Y
Giamarchi
P
P
Burel-Deschamps
L
L
Stephan
L
L