ACSA enables to minimize artifact during sampling and matrix effects (interference) during analyzing by the short period (every 1 hour) sampling with using a PTFE tape filter and a virtual impactor. It is non-conventional approach to measure "the acidity of atmospheric aerosol", which has been difficult to measure precisely using 24-hour sampling method because of gas adsorption or particulate volatility.

To measure mass concentrations simultaneously enables to compare with environmental standards and to estimate the contribution of chemical species or amount of water in PM2.5.