Abstract
Rare earth elements (REEs) in airborne particulate matter collected in Tokorozawa were determined, and the distribution pattern of atmospheric REEs was characterized. Airborne particulate matter samples were collected by high-volume air sampler and PM2.5 air sampler. Sample filters were digested by mixed acid of HNO3, HF and H2O2 in microwave digestion system. Inductively coupled plasma mass spectrometry (ICP-MS) was used for determination of REEs in sample solutions. Positive terbium anomalies were observed in REE patterns of the airborne particulate matter samples. The positive Tb anomaly cannot be observed for natural soil and rock, and may be a unique character of airborne particulate matter in modern urban area in Japan.
