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Abstract: To develop nondestructive acidity prediction for intact Fuji apples, the potential of Fourier transform near infrared (FT-NIR) method with fiber optics in interactance mode was investigated. Interactance in the 800 nm to 2619 nm region was measured for intact apples, harvested from early to late maturity stages. Spectral data were analyzed by two multivariate calibration techniques including partial least squares (PLS) and principal component regression (PCR) methods. A total of 120 Fuji apples were tested and 80 of them were used to form a calibration data set. The influences of different data preprocessing and spectra treatments were also quantified. Calibration models based on smoothing spectra were slightly worse than that based on derivative spectra, and the best result was obtained when the segment length was 5 nm and the gap size was 10 points. Depending on data preprocessing and PLS method, the best prediction model yielded correlation coefficient of determination (γ²) of 0.759, low root mean square error of prediction (RMSEP) of 0.0677, low root mean square error of calibration (RMSEC) of 0.0562. The results indicated the feasibility of FT-NIR spectral analysis for predicting apple valid acidity in a nondestructive way.

[1] Belton, P.S., Kemsley, E.K., McCann, M.C., Ttofis, S., Wilson, R.H., Delgadillo, I., 1995. The identification of vegetable and matter using Fourier transform infrared spectroscopy. J. Food Chem., 54:437-441.

[2] Birth, G.S., Dull, G.G., Renfore, W.T., Kays, S.J., 1985. Nondestructive spectrophotometric determination of dry matter in onions. J. Am. Soc. Hort. Sci., 110:297-303.

[3] Dull, G.G., Birth, G.S., Leffler, R.G., 1989. Use of near infrared analysis of nondestructive measurement of dry matter in potatoes. J. Amer. Potato, 66:215-225.

[4] Dull, G.G., Birth, G.S., Leffler, R.G., Zaltzman, A., Schmmilovitch, Z., 1991. The near infrared determination of moisture in whole date. HortScience, 26(10):1303-1305.

[5] Huxsoll, C.C., Bolin, H.R., Mackey, B.E., 1995. Near infrared analysis potential for grading raisin quality and moisture. J. Food Sci., 60:176-180.

[6] Lammertyn, J., Nicolay, B., Ooms, K., DeSemedt, V., De Baerdemaeker, J., 1998. Non-destructive measurement of acidity, soluble solids and firmness of Jonagold apples using NIR-spectroscopy. Trans. of ASAE, 41(4):1089-1094.

[7] Lammertyn, J., Peirs, A., De Baerdemaeker, J., Nicolai, B., 2000. Light penetration properties of NIR radiation in fruit with respect to non-destructive quality assessment. Postharvest Boil. and Technol., 18:121-132.

[8] Liu, Y., Ying, Y., 2003. A study and fiber sensing technique used for fruit interior quality inspection. J. Sen. Actuator, 16(2):170-174.

[9] Lu, R., Ariana, D.A., 2002. Near-infrared sensing technique for measuring internal quality of apple fruit. Trans. of ASAE, 18:585-590.

[10] Luis, E.R., Fredrick, S.F., Michael, A.M., Elizabeth, M.C., 2001. Rapid analysis of sugars in fruit juices by FT-NIR spectroscopy. J. Carbohydrate Research., 336:63-74.

[11] McGlone, V.A., Robert, B.J., Martinsen, J.P., 2002. Vis/NIR estimation at harvest of pre- and post-storagequality indices for ‘Royal Gala’ apple. Postharvest Bio. and Technol., 25:135-144.

[12] Moons, E., Dardenne, A.P., Sindic, M., 1997. Nondestructive Visible and NIR Spectroscopy for the Determination of Internal Quality in Apple. In: Proceedings from the Sensors for Non-destructive Testing International Conference and Tour. Orlando, FL, NRAES (Northeast Reg. Agric. Eng. Serv.), Ithaca, NY, p.122-132.

[13] Peiris, K.H.S., Dull, G.G., Leffler, R.G., Kays, S.J., 1997. Nondestructive Determination of Sugar Content of Peach by near Infrared Spectroscopy. In: Proceedings of Conference on ‘Sensors for Non-destructive Testing’. Orlando, FL, NRAES, Ithaca, NY, p.77-87.

[14] Peirs, A., Scheerlinck, N., Touchant, K., Nicolai, B.M., 2002. Comparison of Fourier transform and dispersive near-infrared reflectance spectroscopy for apple quality measurements. Biosystems Engineering, 81(3):305-311.

[15] Slaughter, D.C., 1995. Nondestructive determination of internal quality in peaches and nectarines. Trans of ASAE. 38(2):617-623.

[16] Ventura, M., Jager, A.D., Putter. H., Roelofs, F.P.M., 1998. Non-destructive determination of soluble solids in apple fruit by near infrared spectroscopy (NIRS). Postharvest Biology and Technology, 14:21-27.