| 摘要 |
A method of determining a pore characteristic, a method of preparing a sample unit, and a sample unit are provided. In the method of determining, a sample is subjected to an external magnetic field, the sample including a porous substance and a medium including a confined portion confined into the pores of the porous substance and a bulk portion surrounding at least a portion of the porous substance, the sample further including probe gas soluble to the medium and inert to the medium and to the porous substance and having a nuclear magnetic response to electromagnetic stimulation, the nuclear magnetic response depending on the magnetic environment of the probe gas, at least a portion of the probe gas being confined to the pores and being transferred into the pores as dissolved in the confined portion, the medium being selected to generate a magnetic environment for the probe gas confined to the pores that differs from the magnetic environment of the probe gas dissolved in the bulk portion; electromagnetic stimulation is applied to the sample, the electromagnetic stimulation being selected to induce at least one response signal in the probe gas; the at least one response signal is recorded; and the pore characteristic is determined from the at least one response signal.
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