9420免费高清在线观看视频-四虎国产精品永久免费网址-日韩一区欧美一区-久久99亚洲精品久久69-一个人看的www片免费高清视频-日韩欧美一区二区视频-外国特级免费片-三级欧美日韩-少妇黄色一级片-国产九九久久99精品影院-成人一级影视-欧美性猛交乱大交xxxxx-夜夜穞天天穞狠狠穞-懂色av粉嫩av色老板-日韩精品久久一区二区

SiliaBond^?羧酸 (Si-CAA) 可用作胺類或碳酸鹽的清除劑，以及醇鹽和有機(jī)金屬試劑的淬滅劑。

SiliaBondCarboxylic Acid is primarily used as a weak cation exchanger (WCX) in solid phase extraction (SPE) and in HPLC. It is preferred overSiliaBondTosic Acid(SCX) when performing “Catch and Release” purification technique of compounds bearing a permanent positive charge such as tetraalkylammoniums. Using the SCX in this case could make the release of the compound of interest difficult, not to say irreversible, due to the strong interaction between the two strong ioins.SiliaBondCarboxylic Acid has a pka of ≈4.5. It can also be used in ion exchange chromatography (IEC) and has a different selectivity thanSiliaBondTosic Acid (SCX).^1,2