超碰国产剧情av_免费看A级毛片一级毛片视频_在线观看国产日产a_欧美成人观看免费全最熱門最齊全的電影_亚洲精品国产极品美女mm131_久草精品在线观看视频_亚洲粉嫩高潮18p久久_国产丰满主播丝袜勾搭秀_特级全黄一级毛片免费_欧美国产日韩一线区

?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.

?