Solid-Phase Extraction (SPE) is a sample pretreatment technology developed in recent years. It is developed by the combination of liquid-solid extraction and column liquid chromatography technology. It is mainly used for the separation, purification and concentration of samples. Compared with the liquid-liquid extraction method, it can improve the recovery rate of the analyte, more effectively separate the analyte from the interference components, and reduce the sample pretreatment process. The operation is simple, time-saving and labor-saving. Widely used in medicine, food, environmental protection, commodity inspection, pesticide residues and other fields.
Principle: Solid phase extraction is a physical extraction process including liquid phase and solid phase. In the solid phase extraction process, the adsorption force of the solid to the analyte is greater than that of the sample mother liquid. When the sample passes through the solid phase extraction column, the analyte is adsorbed on the solid surface, and other components pass through the column with the sample mother liquid. Finally, use the appropriate Solvent removes analyte
SPE operation steps:
III. Column washing When the sample passes through the extraction column, not only the analyte is adsorbed on the column, but also some impurities are adsorbed at the same time. Choose an appropriate solvent to elute the interfering components while keeping the analyte on the column
IV. Elution of the analyte elutes the analyte in the collection tube. In order to increase the concentration of the analyte or adjust the solvent impurities for later analysis, the collected analyte can be dried with nitrogen and then dissolved Small volume in a suitable solvent.
Features:
â—† Classic 12,24-tube vacuum solid-phase extraction device â—† Standard StopCock valve for precise control of flow rate â—† Test tube rack height can be adjusted to meet different needs â—† Side design of pressure gauge vent valve, easy to use â—† Reasonable design to prevent cross infection Price is extremely high
Purge device
â–² Used in conjunction with Mediwax device â–² Good sample concentration effect â–² Simple operation and economical
â–² Supply various original spare parts:
Stopcock, Retaining clip, Cap, Needle, Support Post, Leg, Plates, Guage, valve, Glass tank, cove, Adapter cap, large volume system
Matching scheme of solid phase extraction device:
A: Basic type:
Mediwax 12 tube (or 24 tube) solid phase extraction device + oil-free vacuum pump
B: Standard type:
Mediwax 12-tube (or 24-tube) solid phase extraction device + oil-free vacuum pump + adapter + solid phase extraction cartridge (selected on demand) + large capacity sampler
C: Multifunctional
Mediwax 12 tube (or 24 tube) solid phase extraction device + oil-free vacuum pump + adapter + solid phase extraction cartridge (selected as required) + large capacity sampling + Mediwax 12 tube (or
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