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Inhomogeneity in epoxy resin standards for quantitative biological X‐ray microanalysis
Author(s) -
Condron R. J.,
Marshall A. T.
Publication year - 1986
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1986.tb02781.x
Subject(s) - epoxy , microanalysis , x ray , biological specimen , materials science , microchemistry , chemistry , analytical chemistry (journal) , composite material , physics , optics , chromatography , organic chemistry
summary It is shown by X‐ray point analyses and line scans that the concentrations of sodium and potassium, as crown ether complexes, in epoxy resin may not be of uniform distribution. The concentrations may be substantially higher in a thin layer at the base of the block. It is recommended that chemical analysis of a selected central region of a block, not the intact block, be carried out to establish the true concentration. This may be substantially lower than the nominal concentration. This problem appears to be less acute with cryptate complexes of sodium and potassium but a similar trend is nevertheless apparent.