Accession Number : AD0786732


Title :   A Critical Evaluation of 1,10-Phenanthroline as a Reagent for Sialic Acid Determinations.


Descriptive Note : Technical note,


Corporate Author : ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD


Personal Author(s) : Snyder,S. L. ; Mathewson,N. S. ; Sobocinski,P. Z.


Report Date : JUL 1974


Pagination or Media Count : 11


Abstract : The use of o-phenanthroline as a reagent for the quantitative determination of sialic acids has been proposed by a previous investigator. This method was based on an increase in absorbance at 307 nm that occurred when solutions of o-phenanthroline and various sialic acids were mixed. It was postulated that the increase in absorbance resulted from the formation of specific complexes. In the present study employing N-acetylneuraminic acid, no evidence for complex formation was found. Results indicate that the observations of the previous investigator resulted from shifts in the pH of the medium rather than from formation of specific complexes. Therefore o-phenanthroline is not a specific reagent for sialic acids and its use is not recommended. (Modified author abstract)


Descriptors :   *Blood analysis, Complex compounds, Ultraviolet spectra, Complex compounds, Nitrogen heterocyclic compounds, Polycyclic compounds, Neuraminic acid


Subject Categories : BIOCHEMISRTY
      MEDICINE AND MEDICAL RESEARCH
      ORGANIC CHEMISTRY


Distribution Statement : APPROVED FOR PUBLIC RELEASE