Is C18 reverse phase?
Is C18 reverse phase?
A C18 column is an example of a “reverse phase” column. Reverse phase columns are often used with more polar solvents such as water, methanol or acetonitrile. The stationary phase is a nonpolar hydrocarbon, whereas the mobile phase is a polar liquid.
What is phenomenex Luna?
The Technology Behind Luna Omega Enhanced with 20 Years of technology, innovation, and experience, Luna Omega columns build upon the Luna legacy to now provide incredible HPLC/UHPLC performance and selectivity. With Luna Omega columns you gain: Greater separation muscle. Better peak shape through an inert foundation.
What is C18 2 column?
Luna® C18(2) is a reversed phase column that provides a measurable improvement over many HPLC columns for two important chromatographic properties – resolution and peak shape. This HPLC column has a fully porous silica as solid support. Recommended for separation of hydrophobic compounds.
What is TMS Endcapping?
In chromatography, endcapping refers to the replacement of accessible silanol groups in a bonded stationary phase by trimethylsilyl groups. Endcapped columns show decreased retention for hydrogen bond acceptors, such as ionized bases, and increased retention for protonated bases.
What is reverse phase silica gel?
Reverse phase silica gel is used in organic chemistry for the purification and isolation of synthetic compounds (i.e. post-reaction “harvesting” of chemical products). As as result of this end-capping, C18 silica gel is insoluble in polar solvents including methanol.
What is Hilic column?
Our broad variety of hydrophilic interaction liquid chromatography (HILIC) columns provides strong retention of compounds that are unretained under conventional reversed phase conditions, without the requirement for ion-pair additives in the mobile phase. These columns are ideal for high sensitivity LC-MS applications.
How does reverse phase work in HPLC?
Reversed-phase chromatography employs a polar (aqueous) mobile phase. As a result, hydrophobic molecules in the polar mobile phase tend to adsorb to the hydrophobic stationary phase, and hydrophilic molecules in the mobile phase will pass through the column and are eluted first.
What is C18 column?
C18 columns are HPLC (high performance liquid chromatography) columns that use a C18 substance as the stationary phase. C18 simply means that the molecules contain 18 carbon atoms, so the other atoms in the molecule can vary, leading to significantly different substances.
What is ODS C18?
Reversed-Phase C18 Columns (ODS) 78. 06. Octadecyl-silica (ODS) is the industry standard packing material for HPLC applications. YMC offers packing materials with an impressive assortment of functional groups for liquid chromatography and a selection of ODS columns that is far ahead of all others in variety.
How does reverse phase chromatography work?
Reversed-phase chromatography is a technique using alkyl chains covalently bonded to the stationary phase particles in order to create a hydrophobic stationary phase, which has a stronger affinity for hydrophobic or less polar compounds. Reversed-phase chromatography employs a polar (aqueous) mobile phase.
