1In a 21 m³ test chamber, a petri dish containing Aflatoxin B1 was placed 1.5 meters from the test device and 1.2 meters above the floor. nanoe™ particles were dispersed into space via airflow from the wall-mounted air conditioner. After exposure, the petri dish was collected and analyzed using liquid chromatography–mass spectrometry (LC-MS).The residual concentration of Aflatoxin B1 was calculated based on the peak area obtained from the LC-MS spectra.