2019 年 68 巻 7 号 p. 513-517
When the lycopene content in tomatoes and related products was evaluated rapidly, the samples had been crushed with water, and we had measured the visible spectra. In addition, the crushed tomatoes and related products have been treated separately. In this paper, to develop a rapid determination method of lycopene in tomatoes and related products, tomatoes are crushed using a mixer (tomato products without crushing) and the visible spectra measured without dilution; both samples were treated together for data analysis. Then, a calibration sample set (n = 29 (tomatoes = 19, tomato products = 10)) gave a coefficient of determination of 0.97 with two independent variables, absorbance at 594 and 740 nm. When the calibration was applied to unknown samples, a prediction sample set (n = 41 (tomatoes = 38, tomato products = 3)), it gave a root mean square (RMS) value of 1.05 mg 100 g−1. Therefore, crushed tomatoes and related products can be used to determine the lycopene content rapidly without dilution and each grouping.