title: Rapid assessment of quality parameters in processing tomatoes using hand-held and benchtop infrared spectrometers and multivariate analysis.
abstract: Two portable infrared sensors were evaluated for the rapid determination of quality parameters in processing tomatoes. A total of 370 hot-break juices were prepared from ∼40 processing tomato varieties grown in 5 California counties. The levels of sugars, acids, soluble solids, titratable acidity, and pH in these juices were determined using standard reference methods. Juices were processed, filtered, and directly applied to the FT-IR crystal (15-40 μL) to obtain spectra. Partial least-squares regression (PLSR) was used to generate correlation models, both calibration and validation. The PLS validation models showed good ability (Rval > 0.80; <10% SEP) in estimating the sugars, acids, and especially soluble solids in tomato for both the transmission DialPath portable system and benchtop unit using triple-bounce attenuated total reflectance (ATR). The IR portable unit may provide the tomato processing industry with an efficient method for in-plant, high throughput quantification of quality parameters in tomatoes.
authors: Department of Food Science & Technology, The Ohio State University , 110 Parker Food Science and Technology Building, 2015 Fyffe Road, Columbus, Ohio 43210, United States.
authors: Elizabeth D
authors: ED
authors: Wilkerson
authors: Gordon E
authors: GE
authors: Anthon
authors: Diane M
authors: DM
authors: Barrett
authors: Glynda Fe G
authors: GF
authors: Sayajon
authors: Alejandra M
authors: AM
authors: Santos
authors: Luis E
authors: LE
authors: Rodriguez-Saona
mesh_terms: D000143:Acids / Q000032:analysis; D002140:California; D002241:Carbohydrates / Q000032:analysis; D005511:Food Handling / Q000379:methods*; D063427:Food Quality; D005638:Fruit / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D016018:Least-Squares Analysis; D018551:Solanum lycopersicum / Q000737:chemistry*; D015999:Multivariate Analysis; D017550:Spectroscopy, Fourier Transform Infrared / Q000295:instrumentation / Q000379:methods*
chemical_list: D000143:Acids; D002241:Carbohydrates