Why add saturated NaCl during extraction?

It should be to pull the ion strength of all samples to a horizontal line · ~~ Some sample ion strength is large ~ Some ionic strength is small ~~ Add NACL to the order of orderMiddle ~~

Improve the intensity of water phase ions and make matter better distribution to organic phase (not all suitable); in addition, it is conducive to two -phase layers

Remove water, remember when I extracted it

Salt analysis is easy to extract on organic phase

The main effects are 2 points: 1. It is the polarity of saturated sodium chloride solution than water, which is conducive to the separation of water phase and organic phase, that is, salt analysis, inhibit the formation of emulsification layer, which is conducive to extraction.2. The distribution ratio of some substances in water and organic phase is not large. By adding sodium chloride, the solubility of the substance in the water phase can be reduced, so that the distribution in the organic phase can be more and increase the extraction rate.