自主研制核磁共振波谱仪的性能评估

System Performance Evaluation of a Self-Developed NMR Spectrometer

主要介绍自主研制500MHz核磁共振谱仪的性能评估情况,旨在建立一台功能完整的核磁共振波谱仪.首先利用系统调试使控制台各个硬件单元在用户软件控制下实现NMR实验中的基本功能,然后通过性能测试保障功率线性度、信号稳定性和场频联锁的可靠性,实验验证了谱仪溶剂峰压制的效果,并获得良好的探头线形指标(0.43/5.46/10.73Hz)和1 H灵敏度指标(信噪比为728∶1),表明自主研制500MHz核磁共振波谱仪系统能够满足常规核磁共振实验需求.

A completelly functional 500 MHz NMR spectrometer, developed by our- selves, was evaluated for its performance. System debugging was performed to demon- strate the basic functions of each unit. Performance tests were performed to evaluate the specifications, including power linearity, signal stability and field-frequency lock sys- tem. The solvent suppression experiement was performed to verified the functionality of the spectrometer. Satisfactory results （Line shape 0. 43/5. 46/10. 73 Hz; signal-to-noise ratio 728 ：1） were obtained with a normal indirect detection probe manufactured by JS Research Inc. The ourcomes of the experiments demonstrates that the self-developed NMR spectrometer can fulfill the demands of routine NMR experiments.