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Determination of Carbonyl Groups in Starches by Polarographic Techniques Using o-Phenylenediamine. V. Reactions of Periodate Oxidized Starches with o-Phenylenediamine.

✍ Scribed by Dr. M. Takagi; M. Mizutani; T. Nishio; Professor Dr. S. Ono

Publisher: John Wiley and Sons
Year: 1970
Tongue: English
Weight: 389 KB
Volume: 22
Category: Article
ISSN: 0038-9056
DOI: 10.1002/star.19700220504

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✦ Synopsis

The reaction o f oxyamylose with o-phenylenediamine (OPD) in alkaline media produces quinoxalines which can be followed by polarographic method and the dialdehyde content can easily be determined polarographically. The lower limit of the determination of dialdehyde content may be 0.01 in the ratio o f NaIO,/AGU. Quinoxalines produced f r o m oxyamylose were studied chromatographically and spectrophotometrically and compared with those from D-glucose. Three quinoxalines were identified with quinoxaline, 2-methylquinoxaline and 2-hydroxyethylquinoxaline. Mechanism o f the reaction of oxyamylose with OPD is discussed.

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