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Nuclear magnetic resonance instrument

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Nuclear magnetic resonance instrument

Classification:
Industry news
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Release time:
2018/03/13
[Abstract]:
The current nuclear magnetic resonance apparatus(NMR)has two forms:continuous wave(CN)and pulse Fourier(PFT)transformation.The continuous wave NMR is mainly composed of magnets
  The current nuclear magnetic resonance apparatus(NMR)has two forms:continuous wave(CN)and pulse Fourier(PFT)transformation.The continuous wave NMR is mainly composed of magnets,radio frequency transmitters,detectors and amplifiers,and recorders(see figure 8-5).Magnets are used to generate magnetic fields.There are three main types:permanent magnet,magnetic field strength of 14000G,and frequency of 60MHz.Electromagnet,magnetic field strength 23500G,frequency 100MHz;Superconducting magnet with a frequency of up to 200MHz and up to 500~600MHz.High frequency instrument with high resolution,high sensitivity and easy to analyze.The magnet is equipped with a scanning coil to ensure that the magnetic field generated by the magnet is uniform and can be changed precisely in a narrow range.A radio frequency transmitter is used to generate a fixed frequency electromagnetic radiation wave.Detectors and amplifiers are used to detect and amplify resonance signals.The recorder maps the resonance signal into a resonance map.
  In the mid-'70s,a pulse Fourier nuclear magnetic resonance(NMR)was developed,which led to the rapid development of 13C NMR.