Emission efficiency for particulate forms of iron and aluminum in rain-water measured by inductively-coupled plasma atomic emission spectrometry

The bulk emission efficiency for particulate forms of iron and aluminum in rain-water was evaluated. The efficiencies for iron and aluminum were >80% for particles 0.4–1 μm in diameter and about 17% for particles >8 μm; relative standard deviations were <20%. A procedure is described by which the concentrations of particulate forms of iron and aluminum in rain-water are determined. Fluctuation of particles in rain-water during a rainfall event can be monitored in detail.