Spectrophotometric Determination of Basic Carbodiimide Perchlorates by the Use of Ferric Benzohydroxamate Formation
1985 年 33 巻 12 号 p. 5375-5379
詳細
1985 年 33 巻 12 号 p. 5375-5379
A method was developed for the determination of 1-ethyl-, 1-isopropyl-, and 1-cyclohexyl-3-(3-dimethylaminopropyl) carbodiimide perchlorates. Benzoic acid and hydroxylamine perchlorate were coupled at 20°C for 40min in ethanolic medium by using the above carbodiimide perchlorates (0.25 to 7.5mM) at pH 5.5. Ferric perchlorate in ethanolic perchloric acid was added to the benzohydroxamic acid formed. The absorbance of the resultant ferric benzohydroxamate was measured at 550nm vs. the blank solution. This method is more sensitive than that using hydroxamate formation via carboxylic acid anhydride, or than the oxalic acid or cyanide method, and is simpler than the method using aniline or barbiturates or aconitic acid.
