Polarographic Studies on Quinoxalines for the Determination of Carbonyl Groups in Starches

スポンサーリンク

概要

• 論文の詳細を見る

• In order to facilitate the characterization of starch derivatives, an accurate and rapid determination method for carbonyl groups has been required. However, none of the methods hitherto reported seem to satisfy such conditions; the chemical reactions utilized for the conventional methods are usually tedious and time-consuming, and often even not specific for carbonyl groups in starch derivatives. Their sensitivity can not cover a wide range of the carbonyl concentrations which are inevitably encountered as a nature of the problem under consideration. The present authors investigated this problem by using polarographic techniques. The method utilizes the formation of polarographically sensitive quinoxaline derivatives in the reaction of carbohydrates with ο-phenylenediamine in alkaline media, in the presence of excess sodium sulfite. All the substances in the reaction mixtures except the formed quinoxaline derivatives under the conditions used are polarographically inactive and do not interfere with the determination by this method. This novel method established by the investigators does satisfy all the requirements as above stated; the method requires only very small amounts of sample, common chemical reagents, simple reaction procedures with short reaction time, and a classical polarographic apparatus. The investigations were started with simple and small carbohydrates as glucose and maltose, and extended to those with high molecular weights above 1,000,000 as amylose and amylopectin. The results obtained by this method were successfully compared in a wide range of the carbonyl concentrations, with those obtained by other conventional methods, each of which may satisfy some part of the problem. The method was also applied to the determination of carbonyl groups in periodate oxidized starch at various oxidation degrees. It would be interesting to predict that this novel method utilizing the chemical reaction of carbohydrates with ο-phenylenediamine will be not only popular as a practical method of determination of carbonyl groups in starch derivatives, but also important as a useful method to obtain various informations on carbohydrate chemistry in its fundamental problems.

• 大阪府立大学の論文
• 1969-03-31

著者

• TAKAGI Masanosuke

  Department of Agricultural Chemistry, College of Agriculture, University of Osaka Prefecture

• Takagi Masanosuke

  Department Of Agricultural Chemistry

• ONO Sozaburo

  Department of Agricultural Chemistry

関連論文

• Quinoxalines Derived from D-Xylose and o-Phenylenediamine under Acidic Refluxed Conditions
• Polarographic Studies on Quinoxalines for the Determination of Carbonyl Groups in Starches
• Quinoxaline Derivatives Derived from Isomaltooligosaccharides with o-Phenylenediamine under Deoxygenated and Heated Alkaline Conditions(Analytical Chemistry)
• Polarographic evidence for the reduction of nitrite to nitrogen monoxide by iron(II) ions in neutral buffer solutions and characteristics of cathodic waves of nitrogen monoxide in the presence of iron ions and citrate.
• Structural Changes of Quinoxaline Derivatives, with Special Reference to 2-(2, 3 -Dihydroxypropyl)-3-hydroxymethylquinoxaline in Alakaline and Acidic Solutions

スポンサーリンク