Parahydrogen induced polarization device and method used in low magnetic field

Abstract

The invention discloses a parahydrogen induced polarization device used in a low magnetic field. The device comprises a parahydrogen gas inlet channel, a protective gas inlet channel and a reaction gas inlet channel, the gas outlet ends of the parahydrogen gas inlet channel, the protective gas inlet channel and the reaction gas inlet channel are respectively connected with one end of a sixth straight-through valve and one end of a seventh straight-through valve, the other end of the seventh straight-through valve is connected with the inlet end of a reactor, the outlet end of the reactor is connected with the inlet end of a fourth one-way valve, the reactor is located in a heating furnace, the heating furnace is connected with a heating furnace controller, the outlet end of the fourth one-way valve is connected with a reaction sampling pipe through a sampling air inlet pipe, and a gauss meter is arranged near the outlet end of the reactor and is connected with a magnetic field intensity displayer. The invention further discloses a parahydrogen induced polarization method used in the low magnetic field. The device is simple in structure and easy and convenient to control and operate, and efficient polarization generation and stable polarization nuclear magnetic spectrogram signal collection are achieved.

Description

technical field [0001] The present invention relates to the technical field of magnetic resonance spectroscopy, and more specifically relates to a device for parahydrogen-induced polarization under a low magnetic field, and also relates to a method for parahydrogen-induced polarization under a low magnetic field. It is suitable for NMR polarization of gas-solid reaction system in a low magnetic field environment with parahydrogen gas as the polarization source. Background technique [0002] NMR technology (Nuclear Magnetic Resonance, NMR) can give key information on material components, molecular structures and related dynamics. It is a very important research method and analysis method. It is currently used in many fields such as biology, chemistry, medicine and physics. have a wide range of applications. The NMR signal intensity is proportional to the number difference of nuclear spin energy level layout in the static magnetic field, while the ratio of nuclear spin energy...

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Problems solved by technology

At present, there is no corresponding device design in China to meet the needs, and there is no commercial design to meet the needs abroad. The design stability of the existing parahydrogen-induced polarization device under low magnetic field is poor, and it is impossible to determine the low magnetic field strength under the addition reaction. It is difficult to meet the rapid transfer of the observed object after the reaction, resulting in the loss of the polarization signal and reducing the signal strength. At the same time, the instrument is relatively heavy and cannot meet the application requirements in a specific environment

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