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以国产熔融天然石英为原料,聚酰亚胺作外涂层,拉制成弹性石英毛细管。在高温下用高纯氮气吹扫柱管,除去管壁上的水和部分羟基。在柱管内壁涂渍较厚液膜的固定液有利于覆盖管壁上的活性点。柱子经过严格的老化处理,制备出涂有OV-101、SE-30、PEG-20M、Superox-4等4种固定液的熔融石英毛细管色谱柱(FQCC)。性能评定结果表明,柱子不经去活处理就具有良好的惰性,避免了因去活处理所造成的弊病。由于柱子具有惰性、高效和稳定等特点,因而已在一些应用中取得了满意的结果。
To domestic melt natural quartz as raw material, polyimide as the outer coating, drawn into flexible quartz capillary. Purge the column with high purity nitrogen gas at elevated temperature to remove water and some of the hydroxyl groups from the tube wall. In the inner wall of the column coated with a thick liquid film of the fixing solution is conducive to covering the active site on the tube wall. The column was subjected to a rigorous aging treatment to prepare a fused silica capillary column (FQCC) coated with four kinds of fixatives such as OV-101, SE-30, PEG-20M and Superox-4. Performance evaluation results show that the column has good inertia without deactivation, to avoid the drawbacks caused by deactivation treatment. Due to its inertness, efficiency and stability, columns have yielded satisfactory results in some applications.