C18: Octadecyl Columns

SMT offers different C18 phases of varying carbon loads, surface area and bonded phases for optimal selectivity in various reversed phase applications
OD Series: SMT SAM OD C18 phase with the highest functional ligand coverage confirmed with carbon analysis results of 24% carbon load. In these series, a very high density of the functional ligand, octadecyl (C18) molecule, is achieved through meticulous mixture of the C18 with proprietary spacer molecules to ensure maximum coverage. These phases are very hydrophobic and are designed to tolerate usage in very aggressive pH conditions and high temperatures.

ODL Series: SMT SAM ODL C18 phase with the lowest functional ligand coverage confirmed with carbon analysis results of 12% carbon load. In these series, the proportional ratio of the functional C18 molecule, mixed with the proprietary spacer molecule, is reduced. The result is a packing material with maximum coverage but much lower functional ligand. Low density C18 packing material ensures faster mass transfer of solutes during separation. These phases have much lower hydrophobicity compared to the standard SMT OD-series. The spacer molecules protect the substrate from aggressive pH conditions and impact unique selectivity compared with other C18 phases.

Elite C18 Series: SMT SAM Elite C18 phases with the intermediate functional ligand coverage confirmed with carbon analysis results of 16% carbon load. In these series, the density of the functional ligand, octadecyl molecule or C18, is moderated with the proprietary spacer molecule to ensure maximum coverage. These phases are moderately hydrophobic; nevertheless, designed to tolerate usage in very aggressive pH conditions and high temperatures.

Symplex C18 Series: SMT Symplex C18 phases are chemically bonded with monofunctional Octadecyl (C18) group. The phase is extremely well end-capped. The bonded phase results in high density of C18 molecules (Carbon Load: 15%). SMT utilizes a proprietary bonding scheme that allows the resulting bonded phases to perform reliably. SMT Symplex C18 columns are made with spherical silica with ultra-high surface area for extremely sensitive and exceptional performance.

Supreme C18 Series: SMT SAM Supreme C18 phases are made with spherical silica with ultra-high surface area for extremely sensitive and exceptional performance. SMT utilizes both patented and proprietary bonding schemes that allows the resulting bonded phases to perform separation of basic, neutral and acidic compounds under aggressive pH and temperature conditions. Supreme (L) C18: Carbon Load – ~16%, Supreme (H) C18: Carbon Load – ~20%

AquSep C18 Series: SMT SAM AquSep (or OD-AQ) phases are unique reversed phase packing material designed to have both hydrophobic and truly hydrophilic spacer ligands. The mixed-phase consists of a meticulously controlled mixture of hydrophobic, C18 molecules, and proprietary hydrophilic molecules, chemically attached on the silica substrate, using Total Coverage™ technology.