1954 年 74 巻 12 号 p. 1327-1332
Thirty-two kinds of 2, 4-dinitrophenylhydrazones were prepared of three aliphatic and eight terpenoid carbonyl compounds, furfural, 5-nitrofurfural, eleven aromatic aldehydes, and eight aromatic ketones. Their surface color was compared by photo-reflectance measured in the range of 400-700mμ with the Beckman Spectrophotometer with diffuse attachment. From the data obtained, reflectance ratio in the different wave lengths and saturated reflectance were compared. By comparing the characteristics of the inclination and the wave length at the standing point of the reflectance curves, it was found possible to represent a delicate difference in the color tone.