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Figure 8.6
Different Types of Nebulizers
The nebulizer was arranged to deposit the solutes on a rotating disk as shown in Figure 8.7. The outer
sheath of gas communicates momentum to the liquid center and the stream is broken up into droplets.
The heating causes rapid evaporation and the solid material is directed to a very small circular spot on
the surface of the stage. It was shown that this nebulizing procedure provided narrow discrete spots of
solute, and could be used satisfactorily with aqueous solvent mixtures. In similar systems, the transport
medium consisted of a layer of potassium chloride on the surface of a zinc-selenium metallic stage, and
the IR spectrum of the deposited material, obtained by diffuse transmission spectrometry. However, it
was not possible to use potassium chloride with aqueous solvents. The authors used a zinc-selenium
window as the transport material, and then examined the spots after deposition, using an FTIR
microscope to measure the transmission spectra.
