Liquid coupled ultrasonic nebulizer

The principle of the liquid coupled ultrasonic nebulizer is shown in Figure 38. The sample solution is held in contact with the coupling liquid (usually water) by a diaphragm. The ultrasonic vibrations are focused by a concave crystal through the coupling medium to the sample. The sample mist formed is swept away to the burner by a carrier gas (air). Frequencies of 70 and 115 kHz have been used, and the average droplet size produced is... 

Figure 38 Principle of the liquid coupled ultrasonic nebulizer...

There are two types of ultrasonic nebulizer (the liquid coupled and vertical crystal systems). The principles of these nebulizers are described in Section 3.2. 

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