The water used in the self-made atomizer is generally physiological saline and 3% hypertonic saline, but sometimes drugs can be directly atomized without water. The concentration of normal saline is 0. The osmotic pressure of 9% sodium chloride solution is close to that of human blood.

The atomizer atomizes the test solution. Atomizer is an important part of atomization system, and its performance has great influence on determination accuracy and chemical interference.