How to Choose a Solid Phase Extraction Cartridges(2)?
The fillers of solid phase extraction cartridges are based on high polymer and inorganic materials.
The second type is based on a high polymer such as polystyrene-divinylbenzene. High-purity, the high-crosslinking styrene-divinylbenzene polymer for stationary phase-filled SPE extraction cartridges with high loading capacity, withstand extreme pH conditions and different solvents, excellent for polar compounds and retention ability. The polymer can be used as a general-purpose adsorbent for acidic, neutral and basic compounds. It is usually used to retain hydrophobic compounds containing hydrophilic groups such as phenols, nitroaromatics, nitramines, nitrates under reversed phase conditions.
The third category is based on inorganic materials such as Floris diatomaceous earth, alumina, graphitized carbon, and the like. Flory Silica is a magnesium oxide composite polar silica adsorbent. The matrix SPE extraction column is suitable for the adsorption of polar compounds from non-polar matrices such as polychlorinated biphenyls, polycyclic aromatic hydrocarbons, organic Chlorine pesticide residues, etc.; Graphitized carbon black (CARB) extraction cartridge, with graphitized carbon black as a filler, the extraction process is very rapid. Moreover, the adsorption capacity of the compound is more than double that of the silica gel. Due to the positive six-membered ring structure on the surface of the graphitized carbon black, it has a strong affinity for planar molecules and is very suitable for extraction and purification of many organic substances, especially suitable for separation. Or remove various substances such as pigments, sterols, phenols and other substances in fruits and vegetables; alumina-based fillers are acid, alkali and neutral, suitable for separation and extraction of acidic, basic and neutral solvents. Hawach has a high-quality Alumina SPE column for your choice.