METHOD AND APPARATUS FOR NONDESTRUCTIVE MEASUREMENT OF COMPONENT OF VEGETABLE ETC. USING NEAR-INFRARED SPECTROSCOPY

摘要

PROBLEM TO BE SOLVED: To provide a method and apparatus that accurately and promptly perform nondestructive measurement of a concentration of a target component, by obtaining a calibration curve with high estimation accuracy in near-infrared spectroscopy and by reducing unnecessary information that causes estimation accuracy of the calibration curve to lower.;SOLUTION: The nondestructive measurement method irradiates a food item to be measured, such as a vegetable, fruit, meat, with a light of wavelength in the range of 400 to 2,500 nm or in a part of that range, obtains an absorbance spectrum by detecting the transmitted light and/or the reflected light, and measures the concentration of a target component of a measuring object by using a calibration curve from the absorbance of all measuring wavelengths or a specific wavelength. In the nondestructive measurement method, the irradiation range of the light of a wavelength to a measuring object is limited to a predetermined region. For example, when the concentration of nitrate ions is measured in vegetable or performing the like, the smaller the measuring object becomes in an order as a root, leaf and lamina, the measurement accuracy is further improved. Moreover, the light of the wavelength to be applied to the measuring object with a requisite minimum can be selected. As a result, a calibration curve with high estimation accuracy is obtained, as well as, the measurement time is shortened.;COPYRIGHT: (C)2010,JPO&INPIT