Both anodic stripping voltammetry (1) and neutron activation analysis in conjunction with electrodeposition (2, 3) have been shown useful in the determination of trace metal ions in aqueous solutions. It would be desirable to apply these techniques directly to natural water and biological systems where the electrode reactions are generally inhibited by the surface-active organic materials present.

Sunmuuy-A review is given of the methods that have been proposed for enrichment of trace elements in samples that are to be analysed by neutron-activation methods. The emphasis is on classification of methods, with full illustrations by means of practical examples.

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