Determination of Mn and Pb in Atmospheric Deposition at a Remote Coastal Site

The electrothermal atomic absorption spectrophotometric determination Mn and Pb in wet, dry and total deposition collected at American Samoa is hindered by interferences due to the dilute sea-spray matrix modification procedures permit direct analysis below 1 ng ml super(-1) for each trace metal. The median monthly deposition of Mn is 5.8, 5.0 and 10.0 ng cm super(-2), and for Pb 9.5, 1.4, and 10.6 ng cm super(-2) for wet, dry and total collections, respectively. Preliminary data suggest effective sampling using these methods at this remote site.