A multicounter system for scanning ultra-low-level radiochromatograms

A multicounter system consisting of an integrated array of flow counters for the scanning of ultra-low-level radioactivity on paper and thin-layer chromatograms was developed. Experience with routine measurements over a prolonged period has proved the advantages of this system over other systems, such as liquid scintillation counting. A description of the flow counter system is given together with an outline of an electronic data acquisition system, and results are presented to demonstrate its features. (Auth.)