紫外線吸収スペクトルによる 2- メチル -5- ビニルピリジン,2- メチル -5- エチルピリジン,3- ピコリンの定量法および 2- メチル -5- ビニルピリジン,2- メチル -5- エチルピリジンの補償定量法

概要

論文の詳細を見る
We studied the ultraviolet spectrophotometric method for the determination of 2-methyl-5-vinylpyridine, 2-methyl-5-ethylpyridine and 3-picoline, and for the compensative methods with an object of the estimation of a large amount of 2-methyl-5-vinylpyridine and a small amount of 2-methyl-5-ethylpyridine with good precision. 0.05M sulfuric acid solution is used as the solvent, and the absorbancies are measured at 263mμ for 3-picoline, 270mμ for 2-methyl-5-ethylpyridine and 300mμ for 2-methyl-5-vinylpyridine respectively. 2-methyl-5-vinylpyridine, 2-methyl-5-ethylpyridine and 3-picoline can be determined by the ordinary simultaneous method with the use of three absorbancies. Absorbancies of the solution containing 2-methyl-5-vinylpyridine or 2-methyl-5-ethylpyridine in various concentration of 2-methyl-5-vinylpyridine were measured, and precisions were compared in the case of the simultaneous determination by the ordinary compensative method. The result indicated that the concentration of 2-methyl-5-vinylpyridine at 25∿30γper ml was the highest. 2-methyl-5-ethylpyridine in 2-methyl-5-vinylpyridine also can be determined more precisely by a compensative method of constant ratio dilution of the sample and the compensative solution.
山梨大学の論文
1960-12-10