Application of near infrared spectroscopy (NIRS) to non-destructive internal quality inspection of tomatoes

Xuemei Tao; Yong He

doi:10.1117/12.710704

27 October 2006 Application of near infrared spectroscopy (NIRS) to non-destructive internal quality inspection of tomatoes

Xuemei Tao, Yong He

Author Affiliations +

Proceedings Volume 6047, Fourth International Conference on Photonics and Imaging in Biology and Medicine; 604710 (2006) https://doi.org/10.1117/12.710704
Event: Fourth International Conference on Photonics and Imaging in Biology and Medicine, 2005, Tianjin, China

Abstract

The internal quality of tomato such as acidity and sugar content is important to its taste thus influences the market. The objective of this paper was to demonstrate the feasibility of using a near-infrared spectroscopy (NIRS) to investigate the relationship between sugar content and acidity of tomato and absorption spectra. The N1RS reflectance of nondestructive tomatoes was measured with a Visible/NJR spectrophotometer in 325-1075 nm range. The sugar content and acidity of tomato were obtained with a handhold sugar content meter and a PH meter. The reflectance data set was recorded and analyzed with some mathematic methods. The PLS (Partial least squares) calibration method was developed for converting the NIRS reflectance of tomato into the data which determined the acidity value. BP (Back propagation) neural network was used to set up the relationship between the NIRS reflectance of tomato and sugar content. The acidity values were detected with an accuracy of 9O% and the sugar contents determined by the BP network were also very close to the measurements (coefficient of correlation r²=0.8764). NW spectra analysis would be very useful in the nondestructive internal quality inspecting of tomato.

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Xuemei Tao and Yong He "Application of near infrared spectroscopy (NIRS) to non-destructive internal quality inspection of tomatoes", Proc. SPIE 6047, Fourth International Conference on Photonics and Imaging in Biology and Medicine, 604710 (27 October 2006); https://doi.org/10.1117/12.710704

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