Laser-induced fluorescence measurement of sodium in flames

In the present work the use of Saturated Laser-Induced Fluorescence Spectroscopy to measure sodiumatom concentrations in flames is described. A flashlamp pumped-dye laser is used to excite the sodium, and the fluorescence signal is observed at 90° forming a focal volume about 27 μm by 1 mm. A linear curve of growth is obtained in an atmospheric flame for concentration in the range 0.008–0.2 PPM.