Scintillator-fiber flow-cell radioactivity detector for liquid chromatography |
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Authors: | T L Rucker H H Ross G K Schweitzer |
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Institution: | (1) Analytical Chemistry Division, Oak Ridge National Laboratory, 37831-6375 Oak Ridge, Tennessee, USA;(2) Department of Chemistry, The University of Tennessee, 37996 Knoxville, Tennessee, USA;(3) Present address: Science Applications International Corp., P.O. Box 2501, 37831 Oak Ridge, TN, USA |
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Abstract: | Summary A new type of flow-cell radiation detector for use in liquid chromatography which is packed with aligned scintillator fibers
is described. A primary advantage of the fiber packed cell is that light generated by the scintillator is absorbed to a much
less extent by the fibers than by the powder scintillator used in conventional flow cells. A detection efficiency of 55% has
been obtained for carbon-14 using 0.1-mm diameter hand-pulled glass fibers. Computer modeling has shown that even better results
can be obtained by using smaller and more uniform diameter fibers which will allow better packing. The fiber cell also demonstrates
back pressures which are a factor of 50 less than the conventional cell and much less susceptibility to absorption of compounds
because of its lower surface area.
Research sponsored by the Office of Energy Research, U.S. Department of Energy, under contract DE-AC05-840R21400 with Martin
Marietta Energy Systems, Inc. |
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Keywords: | Column liquid chromatography Radioactivity detector Solid scintillator Fibre-packed flow cells |
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