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- Author or Editor: R. Niedergesäss x
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Abstract
Instrumental neutron activation analysis (INAA) in the absolute version was applied to 32 fertilizer phosphates of natural and industrial origin including three standard reference materials (NBS-SRM 120b, BCR-SRM No 32 and No 33). With reactor neutrons 48 elements were determined and with 14 MeV neutrons 3 additional elements were found. The results were used to assess the environmental toxicity of the fertilizers and to characterize their different origins.
Abstract
Suspended particulate matter in Elbe river water near Hamburg has been separated into different fractions by pouring the samples into special sedimentation tubes called Atterberg cylinders. The fractions are obtained by decanting the water after different settling periods, and by filtrating the decanted part. The analysis is done by neutron activation in the absolute mode, after irradiation periods of 5 min and 3 days. Mean settling velocities of the SPM-mass and the elements determined have been calculated.
