Synopsis
Densitometric studies on rat liver, myelin and intestinal mucin showed that, among eight groups of reagents tested, only phenylhydrazines and aniline-acetic acid reliably blockaded aldehydes in such a way as to be reasonably resistant to re-oxidation by periodic acid. It is proposed, therefore, that only these agents among those tested should be used to block pre-existing aldehydes before performing the PAS reaction.
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Bayliss, O.B., Adams, C.W.M. Resistance of aldehyde blockades to periodic acid. Histochem J 8, 71–75 (1976). https://doi.org/10.1007/BF01004007
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DOI: https://doi.org/10.1007/BF01004007