You searched for: Chromatography Columns

Supplier: VARIAN

Bond Elut™ PPL is a styrene-divinylvenzene (SDVB) polymer that has been modified with a proprietary non-polar surface. PPL will retain even the most polar classes of analytes, including phenols. The large particle size allows ease of flow for viscous or particulate rich water samples, while the high surface area and strong hydrophobicity ensure reproducible extractions with high recoveries upon elution. Bond Elut™ PPL is suitable for EPA Method 528 ‘Determination of Phenols in Drinking Water by SPE and Capillary GC/MS’.

Supplier: VARIAN

A medium polarity sorbent with many uses, Bond Elut™ CN-E is ideal for applications in which extremely non-polar compounds would be irreversibly retained on high carbon load sorbents such as C₈ and C₁₈. This endcapped version of the cyano sorbent is best utilised when extracting analytes from an aqueous matrix.

Supplier: VARIAN

Bond Elut™ SCX is a strong cation exchanger with a very low pKa. Although the pKa is similar to Bond Elut™ PRS, the presence of the benzene ring in the functional group increases the potential for non-polar interactions. This non-polar characteristic becomes particularly important when conducting ion-exchange from aqueous systems, where selectivity towards compounds exhibiting cationic and non-polar character is seen.

Supplier: Agilent

InfinityLab Poroshell 120 HILIC chemistries combine innovative particle technology and bonded phases to improve retention and peak shape for polar analytes. This enables quick and efficient separations of challenging, highly charged polar compounds, and achieves superior analytical sensitivity in MS mode using MS-friendly eluents.

Supplier: VARIAN

CP-Al₂O₃/Na₂SO₄ is an aluminum oxide PLOT column that offers high selectivity for separating ppm levels of C₁ to C₅ hydrocarbons in a main stream of C₁ to C₅ hydrocarbons. The Na₂SO₄ deactivation salt provides a polar Al₂O₃ surface, so that unsaturated compounds such as ethylene and acetylene are retained longer. These columns analyse more compounds in a single run than packed columns, while still delivering higher resolution and faster analysis times. When compared to liquid stationary phases, CP-Al₂O₃ provides increased selectivity and allows all C₁ to C₅ hydrocarbon isomers to be separated. CP-Al₂O₃ operates without the need for sub-ambient cooling.

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: 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: 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: SciLabware

These chromatography columns are made from PYREX®, borosilicate glass.

Supplier: SciLabware

These chromatography columns are made from PYREX®, borosilicate glass.

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: MACHEREY-NAGEL

NucleoBond® Xtra Midi and Maxi kits contain enlarged columns which leads to lower silica resin beds. This in turn enables faster flow of lysate and buffers through the columns.

Supplier: KNAUER

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

Supplier: PerkinElmer

These cartridge columns are capable of very rapid analysis and has a reliable performance.

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: 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: Agilent

Bond Elut™ online SPE cartridges are designed for use with liquid chromatography (LC) to provide sample cleanup, and in certain applications, pre-concentration.

Supplier: PerkinElmer

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

Supplier: Agilent

Bond Elut™ Plexa polymeric SPE offers simple extraction methods, minimal method development, and improved extract cleanliness, for a wide range of applications.

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: 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: Agilent

Captiva EMR–Lipid provides highly selective and efficient lipid/matrix removal without unwanted analyte loss.

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: VICI JOUR RESEARCH

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

Supplier: Merck

NUCLEOSIL® C18 columns with octadecyl modified silica phase for HPLC.

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: Agilent

Bond Elut™ C18 is a hydrophobic silica sorbent. C18 is commonly used for non-polar compounds. Bond Elut™ C18 is endcapped to reduce interactions with silanol groups.

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.