亚洲视频资源在线I刚发育粉嫩国产精品1IA∨AV白浆导航I九九久久五月天Iwww.色午夜.comI亚洲成人av影片I欧美xxxx非洲I欧美性xxxxxxxxIwww.youjizz.com国产I人鲁片I欧美日本在线视频I精品吃奶一区二区三区视频I无码人妻久久久久一区二区三区91I国产一二三四区I一区2区I久久一单青青Iwww.51久久久I国产久久在线

?C18e is a kind of tail sealing C18 adsorbent packing, which is the most hydrophobic silica based adsorbent. It has excellent retention characteristics for non-polar compounds and most organic compounds. It is the most widely used SPE adsorbent at present. Because C18 has the ability to retain most of the organic substances in the water-soluble matrix, it has the least selectivity, and is often used to treat the samples with many structures or different structures. At the same time, because the c18e packing has no reservation for salt, the c18e column can be used to desalinate some small molecules and some medium-sized molecules instead of the ion exchange column.

Product characteristics

1. The most hydrophobic silica based adsorbent.

2. Because the c18e packing does not retain the salt completely, the c18e column can be used to desalinate some small molecules and some medium-sized molecules instead of the ion exchange column.

?