Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1994-09-20
1996-08-13
O'Shea, Sandra L.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
G01V 318
Patent
active
055459986
ABSTRACT:
A mixing device for the mixing of fluid measuring samples in an NMR measuring device, whereby the measuring device includes a rod (10) which is arranged coaxially to the main field magnet coil of the NMR measuring device to be movable in the axial direction and, on one end, exhibits a piston projecting into the measuring sample and, with the assistance of a drive coil (8) arranged at the end facing away from the measuring sample, is moved in the axial direction when current flows through the drive coil (8), wherein a spring element (7) is provided to move the rod (10) into a rest position when no current flows through the drive coil (8), is characterized by the drive coil (8) being arranged, in an axially movable fashion, in the inhomogeneous region of the magnetic field produced by the main field magnet coil coaxial to the main field magnet coil, the drive coil (8), on one axial end, being rigidly connected to the rod (10) and, on the end facing away from the rod (10), being connected, via the spring element (7), to a housing (1) surrounding the NMR measuring apparatus. In this fashion the mixing device does not require magnetic components which would interfere with the homogeneity of the NMR magnetic field and can be arranged compactly in the vicinity of the measuring sample.
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"A high pressure probe for NMR studies of homogeneous catalysts" by D. G. Vander Velde and J. Jonas in: Journal of Magnetic Resonance 71 (1987) pp. 480-484.
A High-pressure NMR Probehead for Measurements at 400 MHz, A. Zahl et al., Review of Scientific Instruments, vo. 65, Apr., 1994, pp. 882-886.
Favre Patrick
Frey Urban
Marek Daniel
Metz Fran.cedilla.ois
O'Shea Sandra L.
Phillips Roger
Spectrospin AG
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