About the SPE Cartridge Packing Type and Features
Solid phase extraction (SPE) has been recognized as a very useful sample pretreatment technique, as it can avoid many problems caused by liquid-liquid extraction, such as incomplete phase separation and lower quantitative analysis recovery, fragile glassware and large amounts of organic waste.
Compared to liquid-liquid extraction, SPE is more efficient, easy to achieve quantitative extraction, fast and automated, while reducing solvent usage and working time.
Packing type and features
1.Mixed-mode cation exchanger: A mixed adsorbent having strong cation exchange and reverse retention, which is highly selective for alkaline analytes, stable in organic solvents.
2.Weak cation exchanger: Weak cation exchange and reverse retention complex mechanism, which is used to retain and release strongly alkaline analytes, stable in organic solvents.
3.Mixed-mode Anion Exchanger: A mixed adsorbent with strong anion exchange and reverse retention. Highly selective for acidic analytes, stable in organic solvents.
4.Weak Anion Exchanger: Weak anion exchange and reverse retention complex mechanism, which is used to retain and release strongly acidic analytes, stable in organic solvents.
5.Hydrophilic-Lipophilic Balance: Hydrophilic-lipophilic balance chemical structure, strong hydrophobic water-inflatable polymer adsorbent, even after drying, it still has good retention of analytes and it is stable in many organic solvents.
6.Reverse-Phase-Chromatography: Styrene/divinylbenzene as matrix polymer adsorbent
7.C18-Reverse-Phase: A hydrophobic silica matrix C18 bonded phase for the enrichment of analytes in aqueous phase samples.
8.C8-Reverse-Phase: Medium hydrophobic
9.spherical silica NH2: The surface of the adsorbent is weakly alkaline.
10.Spherical silica CN: It is weaker than silica gel under positive conditions. It is less hydrophobic than C18/C8 in the reverse condition.
11.Spherical silica Diol: Medium grade, neutral silica matrix.
12.Spherical silica PSA: Similar to the aminopropyl bonded filler, but with a higher PKa value and a higher ion exchange capacity.
13.Spherical Silica: Polar adsorbents are mainly used to adsorb analytes from non-polar solvents such as hydrocarbon halogenated hydrocarbons or weaker polar esters or ethers, and then washed with more polar solvents such as polar ether ester alcohol acetonitrile water. It can also be used as a medium-strength cation exchange adsorbent in an aqueous medium, or as a carrier for liquid-liquid partition separation.
14.Neutral-Alumina, Basic-Alumina and Acid-Alumina: High surface active polar adsorbent, similar to silica gel, with neutral (N) acidity (A) alkaline (B). There are specific π-electron interactions for aromatic hydrocarbon analytes.
15.Florisil: The SPE cartridge is simple, reliable, reproducible and accurate. The packings can be silicone bonded matrix, polymer matrix and adsorption matrix. The Florisil belongs to the last one. Florisil is a highly selective adsorbent, which consists mainly of three components, silica (84%), magnesium oxide (15.5%) and sodium sulfate (0.5%).
It is a commonly used solid phase extraction packing with good effect and lower cost. It can be used for purification, separation, etc. of pesticide residues; Separation and removal of endocrine and oil; PCBs, PAHs, separation of nitrogenous compounds and antibiotics in hydrocarbons, etc., which is the must-have sample pretreatment cartridge for the NY761 analytical method. It is often used in the analysis of pesticide residues to remove pigments.