Differential analyses of glyoxylate derivatives
1970; Elsevier BV; Volume: 33; Issue: 1 Linguagem: Inglês
10.1016/0003-2697(70)90448-3
ISSN1096-0309
AutoresGodfried D. Vogels, Chris van der Drift,
Tópico(s)Chemical Synthesis and Reactions
ResumoA differential glyoxylate analysis is given that enables differentiation between allantoin, allantoate, ureidoglycolate, and glyoxylate. The optimal conditions for glyoxylic acid phenylhydrazone formation are studied. At higher phenylhydrazine concentrations the rate of this reaction is limited by the dehydration of glyoxylate. The latter reaction is catalyzed by the presence of bivalent cations and phosphate. The conditions for selective quantitative hydrolysis of the glyoxylate derivatives are described and based upon these data six different methods of analysis are given. The conditions of optimal color formation are studied and some novel properties of the product formed are given. The analysis presented is more accurate, sensitive, and selective than former methods.
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