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Chloramphenicol residue extraction method-supercritical fluid extraction

 Last Update: 2021-11-05
 Source: Internet
 Author: User

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2) Supercritical fluid extraction (SFE)

Supercritical fluid (SF) is a fluid that is above the critical temperature (Tc) and critical pressure (pc) and is between gas and liquid
.

SF has the dual characteristics of gas and liquid, the density is similar to that of liquid, the viscosity is similar to that of gas, but the diffusion coefficient is about 100 times larger than that of liquid

3) Solid phase microextraction (SPME)

SPME is a micro-extraction separation technology developed on solid-phase extraction technology.
It is a new solvent-free sample micro-extraction technology that integrates sampling, extraction, concentration and sample injection
.

Compared with solid phase extraction technology, SPME is simpler to operate, more convenient to carry, and cheaper to operate; in addition, it overcomes the shortcomings of low solid phase extraction recovery rate and easy blockage of adsorbent channels

4) Dispersive liquid-liquid microextraction (DLLME)

DLLME technology is one of the pretreatment methods for water sample analysis due to its short extraction time and easy operation.
It is based on a three-phase solvent system
.

Under the action of the dispersant, the extractant is dispersed in the sample solution in the form of tiny droplets to form an emulsion, thereby micro-extracting the analyte in the solution

Related links: Chloramphenicol residue extraction method-liquid-liquid extraction

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