Application of magnetic relaxation time in food safety testing

Food safety is a highly concerned topic for the entire society.Low-field nuclear magnetic resonance (LF-NMR) technology has attracted widespread attention in food safety testing because of no requirement of pre-acceleration,high sensitivity,easy operation,and high localization rates of equipment and reagents.The change of magnetic relaxation time is a key test indicator in LF-NMR techniques.Based on the mechanism and characteristics of horizontal relaxation time T2 and longitudinal relaxation time T1,we reviewed the application of biosensors based on horizontal magnetic relaxation time conversion mechanism,including in the fields of food adulteration identification,moisture detection, chemical contaminant detection and microbiological detection The application of using T1 in increasing the sensitivity of quantitative analysis was reviewed as well