RADIOACTIVE FLOW DETECTORS LIQUID OR SOLID SCINTILLATORS?

The detection of low energy, beta-emitting radionuclides can be accomplished in a number of well researched and documented ways. Gas proportional counting, scintillation counting and auto-radiography are the major methods in use today. The media in which the radionuclide is carried limits the choice of detection methods, especially if premea-surement sample preparation is to be avoided. The measurement technique, for effluents of low and high pressure liquid chromatographs was almost always considered the exclusive domain of scintillation counting. Early work on radio-liquid chromatography was reported using the technique of fraction collection and consequent aliquot counting in a liquid scintillation counter1. This method, while inherently cumbersome, was acceptable since each chromatographic run was long (2-16 hours); resolution of the chromatogram was good, and the resolution volume allowed the collection of several fractions through each peak