What is Octadecylsilyl silica gel column?
Products/Services for Octadecylsilyl Silica Gel HPLC Columns. HPLC Columns – (163 companies) High performance liquid chromatography (HPLC) is a separation technique that uses liquid mobile phase to separate the components of a mixture.
What is difference between ODS and C18 column?
The AQ type C18 column, such the ODS-B, has an end-capping that reduces phase collapse greatly, so it can be run in 100% water if needed. The ODS-A column has a more typical hydrophobic end-capping. Compounds that require more than 50% organic to elute will be less affected by the hydrophilic end-capping on the ODS-B.
What is L19 column?
L19 Strong cation exchange resin consisting of sulfonated, cross-linked styrene divinylbenzene copolymer in the calcium form – about 9 µm in diameter.
What is L11 column?
Conventional HPLC column built to be the cornerstone for your lab; pressure rated for any 400 bar HPLC system. Solid and reliable—delivers the peak shape, reproducibility, ruggedness, and performance you demand.
What is the difference between C18 and C8 columns?
C18 has 18 carbon atoms while C8 has only 8 carbon atoms. C18 has a longer carbon chain, but C8 has a shorter one. C18 has higher retention while C8 has shorter retention. C18 has higher hydrophobicity, but C8 has a lower hydrophobicity.
What is end capped column?
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.
Is C18 column polar or nonpolar?
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 USP L1 column?
According to the United States Pharmacopeia (USP), L1 column packing is defined as “octadecyl silane chemically bonded to porous silica or ceramic micro-particles, 3 to 10 m in diameter.” Some USP methods specifying an L1 column use intermediate pH, and many of these methods were done on a 10 m, 3.9 x 300 mm column.
What is L7 column?
L7 USP columns are described as octyl silane (C8), chemically linked to porous silica particles, 1.5 to 10 µm in diameter. Our high-quality L7 USP columns include: LiChrosorb® RP-8 (5 µm).
What is an L column?
L-column series is the column for reversed-phase high-performance liquid chromatography (RP-HPLC) that enabled separation only by hydrophobic interaction because of inhibition of the secondary interaction with residual silanol groups and metal impurities.
What is L11 packing for HPLC column?
USP L Column Listing
| Column | Description | Column(s) |
|---|---|---|
| L11 | Phenyl groups chemically bonded to porous silica particles, 1.5 to 10µm in diameter | Phen1 Phen2 |
| L12 | A strong anion-exchange packing made by chemically bonding a quaternary amine to a solid silica spherical core, 30 to 50µm in diameter | BSAX Bulk Packings |
What is C18 silica?
C18 silica gel is used for Reversed Phase chromatography for the separation of nonpolar to moderately polar compounds such as: Fatty acids, glycerides, Polycyclic aromatics, Esters (Phthalates), Fat-soluble vitamins, Steroids, Prostaglandins, and PTH amino acids.
