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公开(公告)号：US11796444B2
公开(公告)日：2023-10-24
申请号：US17895831
申请日：2022-08-25
发明人： Roger Meister , Martin Woodtli
CPC分类号： G01N15/1404 , G01N2015/1006
摘要： A flow cell assembly for use in NMR measurements on a liquid NMR sample in an NMR spectrometer has a cylindrical flow cell for receiving the NMR sample, with a first opening at a first end and a second opening at a second end, and a connecting piece arranged at the first opening for connecting a flow line to the flow cell in a fluid-tight manner. An opening diameter dop of the first opening is smaller than an inner flow cell diameter din, and a sealing head of the connecting piece is arranged in the first opening, with a sealing head diameter dseal larger than dop. For NMR measurements, the flow cell assembly is modified in such a way that the flow lines can be easily exchanged, and high-quality NMR flow measurements can be carried out independently of the orientation of the magnetic field in the NMR spectrometer.
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公开(公告)号：US11073579B1
公开(公告)日：2021-07-27
申请号：US17220448
申请日：2021-04-01
摘要： An NMR rotor comprises a receptacle for inserting a sample container into a homogeneous region of an NMR magnetic field with flux density B, the field vector of which in the homogeneous region extends in the vertical direction along a z-axis. The rotor passes through regions with inhomogeneous magnetic field components and a flux density gradient dB/dz when the sample container is introduced. The rotor includes at least two different materials, one with diamagnetic properties and another with non-diamagnetic properties. The different materials are arranged to be geometrically distributed in the rotor so that the magnetic force on the rotor under the effect of a product t of magnetic flux density B and flux density gradient dB/dz, the magnitude of which exceeds 1400 T2/m, either acts in the same direction as the weight force of the rotor or is smaller in magnitude than the weight force of the rotor.
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