Journal
SENSORS
Volume 14, Issue 3, Pages 4167-4176Publisher
MDPI AG
DOI: 10.3390/s140304167
Keywords
nuclear magnetic resonance; tomato paste; spoilage; single-sided coil; T-1 relaxation; saturation recovery; metal container
Funding
- California League of Food Processors
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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 T-1 using a conventional low magnetic field NMR system. The increase in T-1 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 T-1 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.
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