采用一种特殊的填料(LA填料)，制成玻璃填充柱。
A glass column packed with a special packing (la packing) was developed in this work.
填料粒径主要从柱效和压力两方面影响着制备色谱的应用。
Effect of packing material size is mainly on the column pressure and column efficiency.
另外，固相萃取柱填料的粒度对净化效率和试验周期也有重要影响。
In addition, particle size of packing material in SPE column also has important influence on the purification efficiency and test cycle.
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