Abstract
Near infrared spectrophotometry in the direct transmittance mode and in the wavelength range of 800 to 1000 nm was used to measure the % dry matter (DM) in sliced and intact potato tubers (cv Russet Burbank). With thin tissue slices, the correlation (r) between spectral and DM data was-0.975 with a standard error of calibration (SEC) of 0.91. With thick slices and intact potatoes the r, SEC, and standard error of prediction (SEP) values were -0.952, 1.28, 1.69 and -0.918, 1.04 and 1.52, respectively.
Compendio
Se utilizó la espectrofotometría cercana al infrarojo en transmisión directa y en intervalos de longitud de onda de 800 a 1 000 nm, para medir el % de materia seca (MS) en tubérculos de papa cortados en rebanadas, y enteros (cv Russet Burbank). Con rebanadas delgadas de tejido la correlación (r) entre los datos del espectro y la MS fue de -0,975 con un error estándar de calibración (EEC) de 0,91. Con rebanadas gruesas y tubérculos enteros los valores de la r, EEC, y el error estándar de predicción (EEP) fueron -0,952, 1,28, 1,69 y -0,918, 1,04, y 1,52, respectivamente.
Similar content being viewed by others
Literature Cited
Birth, G.S. 1985. Evaluation of correlation coefficients obtained with a stepwise regression analysis. Applied Spectr 39 (4): 729–732.
Birth, G.S., G.G. Dull, W.T. Renfroe and S.J. Kays. 1985. Nondestructive spectrophotometric determination of dry matter in onions. J Am Soc Hortic Sci 110 (2): 297–303.
Birth, G.S. and G.L. Zachariah. 1973. Spectrophotometer for biological applications. Trans Am Soc Agric Eng 16 (2): 371–373.
Brautlecht, C.A. and A.S. Getchell. 1951. The chemical composition of white potatoes. Am Potato J 28: 531–550.
Lulai, E.C. 1986. Potato specific gravity. Chipper/Snacker 43 (8): 28–29.
Norris, K.H. and D.R. Massie. 1981. Multipurpose, linear regression program for analysis ofspectrophotometricdata. Proc 1981 Conf of HP 1000 Int Users Group, Washington DC, Dec. 2.
Orr, P.H. and C.K. Graham. 1983. A generalized model for determining least-cost sources of processing potatoes. Trans Am Soc Agric Eng 26 (6): 1875–1878.
Samotus, B., M. Leja, A. Scigalski, J. Dulinski and R. Siwanowicz. 1986. Analytical remarks to explain some discrepancies in the determination of dry matter and starch from potato tubers’ density. Starch 38: 14–19.
Schippers, P.A. 1976. The relationship between specific gravity and percentage dry matter in potato tubers. Am Potato J 53: 111–112.
Simmonds, N.W. 1977. Relations between specific gravity, dry matter content and starch content of potatoes. Potato Res 20: 137–140.
Tai, G.C.C., G.C. Misener, E.S. Allaby and L.P. McMillan. 1985. Grav-O-Tater: A computer apparatus for measuring specific gravity. Am Potato J 62: 403–408.
Whittenberger, R.T. and G.C. Nutting. 1950. Observations on sloughing of potatoes. Food Res 15: 331–339.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Dull, G.G., Birth, G.S. & Leffler, R.G. Use of near infrared analysis for the nondestructive measurement of dry matter in potatoes. American Potato Journal 66, 215–225 (1989). https://doi.org/10.1007/BF02853444
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02853444