title: Towards using NMR to screen for spoiled tomatoes stored in 1,000 L, aseptically sealed, metal-lined totes.
abstract: Nuclear magnetic resonance (NMR) spectroscopy is used to track factory relevant tomato paste spoilage. It was found that spoilage in tomato paste test samples leads to longer spin lattice relaxation times T1 using a conventional low magnetic field NMR system. The increase in T1 value for contaminated samples over a five day room temperature exposure period prompted the work to be extended to the study of industry standard, 1,000 L, non-ferrous, metal-lined totes. NMR signals and T1 values were recovered from a large format container with a single-sided NMR sensor. The results of this work suggest that a handheld NMR device can be used to study tomato paste spoilage in factory process environments.
authors.affiliation: Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA. mdpinter@ucdavis.edu.
authors.forename: Michael D
authors.initials: MD
authors.lastname: Pinter
authors.affiliation: The Morning Star Packing Company, Woodland, CA 95695, USA. tharter@morningstarco.com.
authors.forename: Tod
authors.initials: T
authors.lastname: Harter
authors.affiliation: Department of Food Science and Technology, University of California, One Shields Avenue, Davis, CA 95616, USA. mjmccarthy@ucdavis.edu.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: McCarthy
authors.affiliation: Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA. maugust@ucdavis.edu.
authors.forename: Matthew P
authors.initials: MP
authors.lastname: Augustine
mesh_terms: D018857:Food Packaging; D063427:Food Quality; D018551:Solanum lycopersicum / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D011309:Preservation, Biological; D066244:Proton Magnetic Resonance Spectroscopy / Q000379:methods*; D013242:Sterilization
chemical_list: D008670:Metals