Laser-Induced Breakdown Spectroscopy Applied on Liquid Films: Effects of the Sample Thickness and the Laser Energy on the Signal Intensity and Stability

Figure 9

(a) RSD of C I line as a function of the laser energy at rotation speed of 40 rpm, measured on diesel (blue) and on peanut oil for two polishing grades of the substrate; the energies where the signal becomes stable are indicated with vertical lines. (b) The threshold energy for stable C I line intensity as a function of the estimated liquid film thickness.

(a)

(b)