Abstract
A method to measure sugar and water contents of unprocessed sugar beet root using near infrared spectroscopy was examined. This is expected to develop a nondestructive device that measures components of sugar beet root on the field. The spectrum was measured from the side of the sugar beet root with skin, and the measuring range was from 800 to 1100nm. The standard curve was created by multiple linear regression analysis between the spectrum and the measured water and sugar content. The standard curve was vaildated by testing samples. The standard errors of sugar and water content measurements were found to be 1.11% and 1.40%. In order to reduce errors, it is recommended to adjust the intensity of the irradiation light and to develop a device that can stick to ruggedness surface of sugar beet.
