维甲酸异构体的微柱固相萃取过程包括柱老化、上样、洗涤、洗脱以及柱再生等步骤。
The sensitivity was improved more than 100-fold. The extraction procedure included conditioning, loading, washing, eluting and regenerating.
在对梁的受拉伸与自重情形下的老化作了分析后，举例分析了真实固体火箭发动机药柱的长期老化效应。
After having solved the aging problems of beams, the long term aging effect of a solid propellent grain is also analyzed as an example.
对未完全损伤的柱子，以老化色谱柱提高柱效，严重损伤、老化者，应更换新柱；
Badly damaged or aged chromatogram column should be substituted by new ones, if not fully damaged, it could be improved by aged chromatogram column.
讨论了不同四甲氧基硅烷（TMOS）与聚乙二醇（PEG）配比、老化条件、陈化时间对硅胶柱的影响，并采用SEM、BET、强度测试等手段对其结构进行表征。
The effects of TMOS/PEG ratios and aging conditions on the pore structure were investigated and the prepared samples were characterized by SEM, BET and hardness tester.
讨论了不同四甲氧基硅烷（TMOS）与聚乙二醇（PEG）配比、老化条件、陈化时间对硅胶柱的影响，并采用SEM、BET、强度测试等手段对其结构进行表征。
The effects of TMOS/PEG ratios and aging conditions on the pore structure were investigated and the prepared samples were characterized by SEM, BET and hardness tester.
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