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1 results

  • An Inexpensive Combustion Apparatus for Preparation of Radioactive Samples

  • Dennis L. Bucholtz, F. Dan Hess
  • Journal:
    Weed Science / Volume 31 / Issue 2 / March 1983
    Published online by Cambridge University Press:
    12 June 2017, pp. 159-162

  • The combustion apparatus described provides a rapid and inexpensive alternative for measurement of radioisotopes in plant parts. The apparatus utilized a nickel-chromium resistance wire connected to a low-voltage transformer to generate the heat required to ignite the plant tissue. The nickel-chromium wire also served as the sample holder. Combustion was performed in an O2-flushed liquid scintillation vial, and the combustion gases containing either 14CO2 or 3H2O were trapped in situ, scintillant was added, and the vials assayed for radioactivity. The percentage of the radioactivity recovered after combustion was 96.0 for 14C and 93.4 for 3H with standard deviations of 6.8 and 3.0%, respectively.