You searched for: Chromatography Columns

Supplier: VARIAN

Due to the methyl group and subsequent low carbon load, Bond Elut™ C1 is the least retentive of all alkyl group bonded phases for non-polar compounds. However, due to the extensive end capping of this sorbent to mask polar silanol activity, retention and elution of polar and multi-functional analytes can still be achieved. Typical applications include plasma, urine and aqueous samples.

Supplier: VARIAN

Bond Elut™ PRS is a strong cation exchange sorbent that is also relatively high in polarity. With no appreciable degree of hydrophobicity, in non-polar solvents, PRS is capable of polar and hydrogen bonding interactions. Due to the very low pKa of PRS, a high ionic strength eluent must be used, and so the use of PRS is recommended for weaker cationic species such as pyridinium compounds.

Supplier: VARIAN

PBA is a unique sorbent consisting of a phenylboronic acid covalently linked to a silica gel surface. Covalent processes result in a higher retention to the sorbent surface than other mechanisms, resulting in superior clean-up. The boronate group has a high specificity for cis-diol containing compounds such as catechols, nucleic acids, low molecular weight proteins and carbohydrates.

Supplier: VARIAN

Bond Elut™ C18 is the most hydrophobic, bonded silica sorbent in the Bond Elut™ range. It is the most popular SPE sorbent because of its extremely retentive nature for non-polar compounds. C18 is generally regarded as having the broadest spectrum of retention among bonded silica sorbents, since it retains most organic analytes from aqueous matrices. When analysing small to intermediate molecules, Bond Elut™ C18 can be used for desalting aqueous matrices prior to ion exchange, as salts pass through the sorbent unretained.

Supplier: VARIAN

The water-wettable, hydroxylated exterior allows excellent flow, even with biological fluids. A gradient of polarity on the polymer surface shunts small analytes to the more hydrophobic centre of the polymer bead, where they are retained prior to the washing and elution steps. Plexa provides these performance enhancements due to a unique polymeric architecture with a non-retentive, hydroxylated, amide-free surface and a non-polar PS/DVB core for retaining small molecules.

Supplier: VARIAN

Bond Elut™ Certify II was developed specifically for the rapid and effective extraction of acidic drugs and metabolites from urine and other biological matrices. Certify II is a mixed-mode cartridge packed with non-polar C8 and strong anion exchange (SAX) sorbent. It has been optimised for acidic drugs such as 11-nor-delta-9-tetrahydrocannibinol-carboxylic acid, salicylic acid, ibuprofen, acetaminophen and other compounds that possess both non-polar and anionic characteristics.

Supplier: Agilent

Step 1: Extraction
Choose the extraction salt packet based on your method of analysis, AOAC or EN. The buffered extraction salts are amenable for more liable pesticides. Adding solvent and then salts to a comminuted fruit or vegetable sample (10 g or 15 g) enables you to extract the pesticides of interest into the organic layer. However, adding a food sample with a high percentage of water directly to the salts may create an exothermic reaction that can affect your analyte recoveries.

Supplier: Agilent

Step 2: Dispersive SPE cleanup
Select the dispersive SPE kit suited to the type of food being analysed and the method you are following. In this step, an aliquot of the sample extract from step one (see QuEChERS extraction kits) is added to a 2 or 15 ml centrifuge tube containing a small amount of SPE sorbent and MgSO₄. The sorbent will pull out interfering matrix materials from the sample, while the MgSO₄ helps remove excess water and improve analyte partitioning.

Supplier: KIMBLEKONTES

Chromatography column made from borosilicate glass.

Supplier: KNAUER

These columns with HPLC phase are perfectly suited to take on routine analyses as well as the most ambitious chromatography tasks.

Supplier: KIMBLEKONTES

These chromatography columns have borosilicate glass column barrels and acrylic water jackets. The acrylic water jackets provide thermal control of temperature-sensitive chromatographic separations. They also act as a safety shield.

Supplier: NEUBERT VOLUME GLASSWAERE

Glass, Empty columns: Yes, Ø int.: 200 mm, Length: 300 mm

Supplier: NEUBERT VOLUME GLASSWAERE

These chromatography columns feature a top sleeve with PTFE tap and are made from borosilicate glass 3.3.

Supplier: Uptima

These flash chromatography columns, irregular C18 silica serves a broad-ship of purification requirements for mid to non polar compounds.

Supplier: PerkinElmer

The online SPE cartridge has been specially designed for elution to the HPLC column. Dimensions are optimised to combine high extraction capacity with small elution volumes.

Supplier: OMNIFIT

EZ columns are designed to suit the majority of standard laboratory chromatography applications. They are ideal for aqueous systems and compatible with solvents used in common liquid chromatography applications such as protein purification.

Supplier: VICI JOUR RESEARCH

The in-line PEEK guard cartridges extend the life of analytical columns by trapping contaminants from the sample and mobile phase, thereby preventing loss of retention. Only PEEK and titanium contacts the mobile phase and sample. This system is ideal for use with proteins or other biopolymers that may be contaminated or absorbed by steel surfaces.

Supplier: PerkinElmer

The MPLC cartridge system allows direct coupling of an analytical and NewGuard™ cartridge without introduction of any dead volume. A specific cartridge holder (30, 100, 220 mm) is required for each cartridge length.

Supplier: KNAUER

These endcapped Eurospher I columns are used in the determination of water soluble vitamins, steroids, catecholamines, sedatives and many other applications fields.

Supplier: VICI JOUR RESEARCH

These PEEK columns are designed for naro-bore applications with small amount of samples.

Supplier: OMNIFIT

EZ SolventPlus™ columns are designed for maximum chemical compatibility. Borosilicate glass and PTFE construction, with Chemraz® o-rings and PTFE frits, only the most inert materials are present in the fluid path. ETFE end caps and fitting nuts ensure a chemically inert connection into and out of the system.

Supplier: BEHR

Glass column with GL45 on both ends, GS 950, according to LUA bulletin no. 20, Ø int.: 60,00 mm, Length: 320 mm, Capacity: 950 ml

Supplier: UPCHURCH SCIENTIFIC

This narrow-bore short column (2,0×20 mm) creates only a slight pressure increase with virtually no detectable theoretical plate loss when used with a 3 mm int.Ø or larger column.

Supplier: VWR Collection

These economical columns are constructed with borosilicate glass barrels, molded polypropylene end caps, and polyethylene bed supports.

Supplier: PerkinElmer

These superficially porous particle (SPP) columns produce sharper peaks and faster separation results due to their breakthrough particle design and size.

Supplier: WATERS

µBondapak® C18 columns are general purpose, silica-based, reversed phase C18 columns that are based on 10 µm particle technology.

Supplier: WATERS

XTerra® MS C8 columns are general purpose, hybrid-based, reversed phase C8 columns that are designed to be compatible with mass spectrometry applications. These first generation columns provide superior pH stability compared to a silica based column.

Supplier: WATERS

XTerra® RP18 columns are general purpose, hybrid-based, reversed phase C18 columns that incorporate Waters patented embedded polar group technology to improve peak shape performance for highly basic compounds. These first generation columns provide superior pH stability compared to a silica-based column.

Supplier: WATERS

Styragel® HR columns are high-resolution GPC columns packed with 5 µm particles and are ideal for characterising samples in the low to mid molecular range where high resolution is critical.

Supplier: WATERS

These columns complement the ACQUITY BEH C18 and C8 phases and provide a necessary and powerful tool for HPLC method development. The embedded carbamate group in the bonded phase ligand provides alternate selectivity, especially for phenolic compounds compared to straight chain alkyl columns.