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Updated: Oct 21, 2025

Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
Published on: November 12, 2016
Molecular Concentration Determination Using Long-Interval Chemical Exchange Inversion Transfer (CEIT) NMR
Weiping Jiang1,2, Qianni Guo1,2, Qing Luo1
1Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, People's Republic of China.
This study introduces a faster method for measuring molecule concentration using long-interval chemical exchange inversion transfer (CEIT) NMR spectroscopy. This technique significantly reduces scan times for enhanced molecular imaging applications.
Area of Science:
- Nuclear Magnetic Resonance (NMR) Spectroscopy
- Molecular Imaging
- Biomolecular Detection
Background:
- Functionalized hyperpolarized xenon "cage" molecules enable ultrasensitive detection.
- Accurate and rapid measurement of molecule concentration remains a challenge in current methods.
Purpose of the Study:
- To develop a novel method for rapid and accurate molecule concentration measurement.
- To improve upon existing Hyper-CEST (chemical exchange saturation transfer) techniques.
Main Methods:
- Utilizing long-interval chemical exchange inversion transfer (CEIT) NMR spectroscopy.
- Quantitative measurement achieved with as few as 2 scans.
- Optimization of CEIT effect for maximum accuracy.
Main Results:
- Acquisition time reduced approximately 10-fold compared to conventional Hyper-CEST.
- Concentration determination accuracy is maximized when CEIT effect is near 1-1/e.
- Achieved relative deviation of less than ±1% for CrA-(COOH)6 with one-step optimization.
Conclusions:
- The proposed CEIT NMR method offers efficient and accurate molecule concentration determination.
- This technique has potential for rapid quantitative molecular imaging applications.
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