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在毛细管内壁，原位合成了Ｎａ－Ａ型分子筛，成功制备出一类新型分子筛多孔层毛细管柱。和涂渍相比，原位合成法在毛细管内壁形成的分子筛层更加均匀、致密，更能体现出分子筛对低碳烃的分离特性，实验表明用超短毛细管柱即可对低碳烃进行良好的分离。
In the inner wall of the capillary, Na-A type molecular sieve was synthesized in situ, and a new type of porous molecular capillary column was successfully prepared. Compared with the coating, the molecular sieve layer formed by the in-situ synthesis method on the inner wall of the capillary is more uniform and dense, which can better reflect the separation characteristic of the low-carbon hydrocarbon by the molecular sieve. Experiments show that the ultra-short capillary column The separation.