Solid phase extraction column (SPE column in English, or Solid Phase extraction Cartridges, SPE cartridges for short) is a sample pretreatment device for extraction, separation, and concentration developed from chromatography columns.
The capacity of SPE cartridges refers to the adsorption capacity of the solid phase extraction column packing. For a solid phase extraction column based on silica gel, its capacity is generally 1~5 mg/100 mg, that is, the column capacity is 1%~5% of the mass of the packing. The capacity of the bonded silica gel ion exchange filter cartridge adsorbent filler is expressed in meq/g. The capacity of this type of filler is usually 0.5 to 1.5 meq/g. The special cartridge according to matrix type. SPE cartridges consist of medical PP empty tube, medical PE sieve plate, and a fixed adsorbent.