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  • Comparison of the radioisotope dilution-coated charcoal method and a microbiological method (L. leichmannii) for measuring vitamin B12 in serum

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Comparison of the radioisotope dilution-coated charcoal method and a microbiological method (L. leichmannii) for measuring vitamin B12 in serum
  1. J. L. Raven,
  2. P. L. Walker,
  3. P. Barkhan
  1. Haematology Laboratory, Guy's Hospital, London

    Abstract

    A comparison has been made of the radioisotope dilution-coated charcoal method and a microbiological assay (with L. leichmannii as test organism) for determining the concentration of vitamin B12 in serum. A satisfactory correlation was found between the results of the two methods. Under appropriate conditions the reproducibility of the radioisotope method compared favourably with that of the microbiological method.

    https://doi.org/10.1136/jcp.19.6.610

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