核磁共振波谱仪探头电路剖析与研制

THE ANALYSIS AND PREPARATION OF THE PROBE’S CIRCUIT OF NMS SEPECTOMETER

对核磁共振波谱仪所用的双调谐共用线圈探头进行系统电路分析，并推导出设计制作的理论公式，根据公式设计制作了傅立叶变换波谱仪的高质探头电路，用在ＣＨ４００型核磁共振仪上，灵敏度性能达到５０∶１，在５ｍｍ氢探头和１％甲苯，对５０％的乙醛可达到５．

Through the analysis of systematic circuit of doubletuned commonuse coil probehead used in NMR spectrometer, a theorectic formula was obtained, according to which, one highquality probehead circuit of Fourier Transformation spectrometer is designed and used in Model CH400 NMR spectrometer, the sensitivity of which reaches 50∶1,the resolution factor of which, with 5 mm H probehead and 1% toluene and 50 ethanal, can reach 5.24×10 -9 .