Towards Using NMR to Screen for Spoiled Tomatoes Storedin 1,000 L, Aseptically Sealed, Metal-Lined Totes

Sensors

Michael D. Pinter¹  Matthew P. Augustine¹  Michael J. McCarthy²  Tod Harter³ 

[1] Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA;Department of Food Science and Technology, University of California, One Shields Avenue,Davis, CA 95616, USA;The Morning Star Packing Company, Woodland, CA 95695, USA;

关键词: nuclear magnetic resonance;    tomato paste;    spoilage;    single-sided coil;    T1 relaxation;    saturation recovery;    metal container;   

DOI  :  10.3390/s140304167

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown