Abstract

The use of liquid scintillation counting in clinical laboratories and for biomedical research has increased greatly over the more than 25 years that commercial LS counters have been available. Vibrating reed electrometers and gas-filled ionization detectors for the measurement of tritium and carbon 14 respectively have been supplanted by LSC. Other commonly employed isotopes for which LSC is now the preferred method are: 32 P, 35 S, 45 Ca, 55 Fe, and the α-emitting actinides (McDowell and Weiss, 1976). Other isotopes counted by LSC have recently been listed by Gibson (1976), Bransome and O'Conner (1978), and Soini (1978).

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