Instrumental neutron activation analysis of dry atmospheric fall-out and rain-water |
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Authors: | P. Schutyser W. Maenhaut R. Dams |
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Affiliation: | nstitute for Nuclear Sciences, Rijksuniversiteit Gent, Proeftuinstraat 86, B-9000 GentBelgium |
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Abstract: | An automated precipitation sampler and an instrumental neutron activation analysis (i.n.a.a.) method for the determination of some major and trace elements in dry atmospheric fall-out and rain-water are presented. The sampler features a rain detector which makes separate collection of dry atmospheric fall-out and rain-water possible. The sampler is equipped with u.v. lamps in order to avoid algal growth during extended collection periods. After collection, the samples are separated into water-soluble and insoluble fractions. The soluble fraction is preconcentrated before analysis by freeze-drying. The i.n.a.a. method involves the measurement of both short- and long-lived radioactivities so that a total of 35 elements can be determined. The possibility of losses during freezedrying and the accuracy of the i.n.a.a. method were investigated for 7 elements by analysis of a soluble fraction with an independent method, viz. inductively coupled plasma atomic emission spectrometry. |
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