부산대학교 도서관

The primary goal of the monitoring program is to obtain a long-term and general rural background of ambient trace-metal concentrations in upstate New York. The resulting data will provide a baseline that may be used to track any future trends in atmospheric metallic loadings in that region. In this study, the ambient trace-metal concentrations at five rural sites will be monitored for 2 yr. Automatic dichotomous samplers with a PM10 inlet are being used to collect fine particles and coarse particles. During the 2-yr study, 7,300 samples will be collected. Of these, 1,498 fine-particle samples and 150 coarse-particle samples will be analyzed by instrumental neutron activation analysis (INAA). The remainder of the samples will be archived. Equipment has been installed at the sites, and sampling has continued since October 1, 1991. In addition to ambient particle collection, wet deposition samples are being collected weekly for a 2-yr period at the Moss Lake site. Similarly, samples will be collected at Lake Champlain starting in the spring of 1992. Portions of these samples will be freeze-dried and analyzed by INAA. Inductively coupled plasma mass spectrometry will be used to analyze some of the samples to verify these results for certain elements. In addition, the samples will be analyzed for SO{sub 4}{sup {minus}2} and NO{sub 3}{sup {minus}}.