Anion in inhalable particulate matter can be completely dissolved in water by using ultrasonator and then measured by ion chromatography.Good accuracy and precision can be obtained.
The characteristic of this air conditioning is to carry water of eject mist shape, absorb pelagian the bacterium in air, dirt and insalubrious gas, produce an anion.
But they're really just positively-charged cations — like calcium, sodium, and potassium — and negatively-charged anions, like phosphate, sulfate, and bicarbonate.