title: FTIR and NDIR spectroscopies as valuable alternatives to IRMS spectrometry for the δ(13)C analysis of food.
abstract: The (13)C/(12)C carbon isotope ratio is a chemical parameter with many important applications in several scientific area and the technique of choice currently used for the δ(13)C determination is the isotope ratio mass spectrometry (IRMS). This latter is highly accurate (0.1‰) and sensitive (up to 0.01‰), but at the same time expensive and complex. The objective of this work was to assess the reliability of FTIR and NDIRS techniques for the measurement of carbon stable isotope ratio of food sample, in comparison to IRMS. IRMS, NDIRS and FTIR were used to analyze samples of food, such as oil, durum, cocoa, pasta and sugar, in order to determine the natural abundance isotopic ratio of carbon in a parallel way. The results were comparable, showing a close relationship among the three techniques. The main advantage in using FTIR and NDIRS is related to their cheapness and easy-to-operate in comparison to IRMS.
authors: Department of Chemistry and Biology, University of Salerno, via Giovanni Paolo II 132, Fisciano, SA, 84084 Italy.
authors: Concetta
authors: C
authors: Pironti
authors: Department of Chemistry and Biology, University of Salerno, via Giovanni Paolo II 132, Fisciano, SA, 84084 Italy. Electronic address: aproto@unisa.it.
authors: Antonio
authors: A
authors: Proto
authors: Research and Innovation Centre, Fondazione Edmund Mach (FEM), Via E. Mach 1, San Michele all'Adige, TN, 38010 Italy.
authors: Federica
authors: F
authors: Camin
authors: Department of Chemistry and Biology, University of Salerno, via Giovanni Paolo II 132, Fisciano, SA, 84084 Italy.
authors: Raffaele
authors: R
authors: Cucciniello
authors: Department of Medicine, Surgery and Dentistry "Scoula Medica Salernitana", University of Salerno, via S. Allende, Baronissi, SA, 84081 Italy.
authors: Ilaria
authors: I
authors: Zarrella
authors: Department of Medicine, Surgery and Dentistry "Scoula Medica Salernitana", University of Salerno, via S. Allende, Baronissi, SA, 84081 Italy.
authors: Oriana
authors: O
authors: Motta
mesh_terms: D002247:Carbon Isotopes / Q000032:analysis*; D000069956:Chocolate / Q000032:analysis; D019422:Dietary Sucrose / Q000032:analysis; D005433:Flour / Q000032:analysis; D005504:Food Analysis / Q000379:methods*; D013058:Mass Spectrometry / Q000379:methods; D010938:Plant Oils / Q000032:analysis; D013055:Spectrophotometry, Infrared / Q000379:methods; D013213:Starch / Q000032:analysis
chemical_list: D002247:Carbon Isotopes; D019422:Dietary Sucrose; D010938:Plant Oils; D013213:Starch
keywords: Carbon stable isotope ratio; Food; Fourier Transform Infrared Spectroscopy (FTIR); Isotope Ratio Mass Spectrometry (IRMS); Non–dispersive Infrared Spectroscopy (NDIRS)