A method for sample preparation and loading before solid-state NMR characterization of gas hydrate
A technology for gas hydrates and solids, which is applied in the direction of nuclear magnetic resonance analysis, measuring devices, instruments, etc., can solve the problems of unable to complete the nuclear magnetic test, cover damage, etc., and achieve efficient and fast sample preparation, strong and not easy to break, strengthened Efficiency effect
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[0031] The performance parameters of the solid-state NMR ultra-low temperature special cover for solid-state NMR characterization of the gas hydrate structure in this embodiment are: working temperature: -196°C to room temperature, and rotation speed: 0-5KHz. as methane gas hydrate 13 Take the CNMR test as an example.
[0032] A method for sample preparation and sample loading before solid-state NMR characterization of gas hydrates, the method comprising the following steps,
[0033] 1) Take a 5L insulated box with a cover, add 2.5L of liquid nitrogen, put the rotor, special cover for solid nuclear magnetic ultra-low temperature, sampling spoon, mortar, sample loading tool, and cover loading tool into liquid nitrogen for precooling;
[0034] 2) Add 20mL of liquid nitrogen to the pre-cooled mortar in step 1), put the methane gas hydrate generated in the reaction device into the mortar, grind finely, and then add 20mL of liquid nitrogen to ensure that the methane Gas hydrates ...
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