Chinese Journal of Magnetic Resonance ›› 2019, Vol. 36 ›› Issue (4): 563-570.doi: 10.11938/cjmr20192713

• Articles • Previous Articles    

Intermolecular Double-Quantum Coherence NMR Spectroscopy of Fruits Under Inhomogeneous Field

LI Zhen1, CAI Hong-hao1, LEI Guo-wei1, LAI Zong-ying2, WU Meng-jian3, YAN Jin3, PAN Shao-bin1   

  1. 1. School of Science, Jimei University, Xiamen 361021, China;
    2. Information Engineering College, Jimei University, Xiamen 361021, China;
    3. College of Electronic Science and Technology, Xiamen University, Xiamen 361005, China
  • Received:2019-02-15 Online:2019-12-05 Published:2019-04-25

Abstract: Nuclear magnetic resonance (NMR) spectroscopy is an effective way to obtain in situ chemical information in biological tissues, and used in various application fields, including biology, food and medicine. It is often desirable to acquire high-resolution spectra of obtain more information of the sample, such as J-couplings, split structure and etc. However, acquiring high-resolution spectra under inhomogeneous field can be challenging. It has been shown previously that intermolecular double-quantum coherence (iDQC) derived from remote dipole-dipole interactions are insensitive to magnetic field inhomogeneity, and can be utilized to obtain high-resolution spectra under inhomogeneous fields. In this work, the IDEAL-II sequence was used to detect iDQC in butyl methacrylate, tomato and watermelon under inhomogeneous fields to obtain high-resolution spectra of these samples. The results demonstrated that the iDQC technology may provide a valuable tool in food science research.

Key words: nuclear magnetic resonance (NMR), inter-molecular double-quantum coherences (iDQC), fruit detection, inhomogeneous magnetic field

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