title: Energy from fat determined by near-infrared reflectance spectroscopy.
abstract: The amount of energy derived from fat in foods is a requirement of U.S. nutrition labeling legislation and a significant factor in diet development by health professionals. Near-infrared (NIR) spectroscopy has been used to predict total utilizable energy in cereal foods for nutrition labeling purposes, and in the current study, was investigated as a method for evaluation of the amount of energy derived from fat. Using NIR reflectance spectra (1104-2494 nm) of ground cereal samples and reference values obtained by calorimetry and by calculation, modified PLS regression models were developed for the prediction of percent energy from fat and energy from fat/g. The models were able to predict the percent of utilizable energy derived from fat with SECV and R(2) of 1.86-1.89% of kcal (n = 51, range 0-43.0) and 0.98, respectively, and SEP and r(2) of 1.74% of kcal (n = 55, range 0-38.0) and 0.98, respectively, when used to predict independent validation samples. Results indicate that NIR spectroscopy provides useful methods for predicting the energy derived from fat in food products.
authors.affiliation: Quality Assessment Research Unit, Richard B. Russell Agricultural Research Center, Agricultural Research Service, U.S. Department of Agriculture, P.O. Box 5677, Athens, Georgia 30604-5677, USA. sekays@qaru.ars.usda.gov
authors.forename: Sandra E
authors.initials: SE
authors.lastname: Kays
authors.forename: Franklin E
authors.initials: FE
authors.lastname: Barton
mesh_terms: D002138:Calibration; D004041:Dietary Fats / Q000032:analysis*; D002523:Edible Grain / Q000737:chemistry; D002149:Energy Intake; D005515:Food Labeling; D012044:Regression Analysis; D019265:Spectroscopy, Near-Infrared
chemical_list: D004041:Dietary Fats