Abstract
A system for the detection of radioactive effluents from a gas chromatograph is described. The effluents are continuously dissolved in a stream of scintillator solution. After most of the carrier gas has been split off, the solution is led at a constant rate through a helical flow cell inserted in a liquid scintillaiton counter. The main advantages of the system are its expediency for all radioactive compounds, the absence of tailing or memory effects, good resolution and high sensitivity (less than 0.5 nCi). Peak fractions can be collected after they have passed through the flow cell for accurate activity measurements. The method is also suitable for distinguishing between compounds labelled with two different radioactive isotopes.
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