9014 Résultats pour : "VARIAN"

Supplier: VARIAN

Lampe à cathode creuse, Pour: Atomic absorbtion spectroscopy, Single element, hollow cathode lamps coded, using octal base lamps, calcium

Supplier: VARIAN

La famille de produits PLRP-S se compose de plusieurs tailles de pores et de particules ayant tous la même structure chimique et les mêmes caractéristiques d'adsorption fondamentales. Les particules sont intrinsèquement hydrophobes, si bien qu'aucun ligand alkyle de phase greffée n'est nécessaire pour des séparations en phase inverse. Cela donne un matériau hautement reproductible exempt de silanols acides et d'ions de métaux lourds. La large gamme de produits disponibles propose des colonnes adaptées aux séparations analytiques et aux purifications préparatives.

Supplier: VARIAN

Des gaz propres permettent de réduire le risque d'endommagement de la colonne et d'améliorer la précision ainsi que la sensibilité. Ces filtres incassables et avec indicateur offrent une sensibilité élevée à l'oxygène et à l'humidité. Ils peuvent être installés en quelques secondes sans le moindre outil.

Supplier: VARIAN

Bond Elut™ C8 is very similar in properties to C18, but is not as retentive for non-polar compounds, due to its shorter hydrocarbon chain, and therefore reduced carbon loading. C8 is an excellent replacement for C18 when analytes are too strongly retained for effective elution. The potential for polar interactions is somewhat higher than for C18 because there is less coverage of the silica surface. These polar interactions are not, however, a significant property of C8.

Supplier: VARIAN

Bond Elut™ NH₂ is a weaker anion exchanger than sorbents such as SAX (a quaternary amine sorbent that is always charged) and is therefore a better choice for retention of very strong anions, such as sulfonic acids, which may retain irreversibly on a SAX sorbent. Similar to Diol and SI sorbents, Bond Elut™ NH₂ is excellent for the separation of structural isomers.

Supplier: VARIAN

These rigid, strong ion exchange materials are extremely hydrophilic that is ideal for purification of biomolecules. The PL-SAX and PL-SCX materials are totally polymeric and are chemically and thermally stable over a full range of HPLC conditions.

Supplier: VARIAN

Organic samples, ketone based organic solvents (includes Marprene™ pump tubing (one each black/black and white/white), FEP transfer tube (spray chamber to torch), drain tubing, tubing for waste line, one pack of EzyFit connectors, nebulizer capillary tubing, connectors and connecting tubing).

Supplier: VARIAN

High efficiency 0,15 and 0,18 mm Int.Ø columns are a simple and cost effective way to increase sample throughput with existing GC or GC/MS instruments.

Supplier: VARIAN

The MetaCarb™ line of carbohydrate columns provides high resolution columns for applications requiring high performance carbohydrate and organic acid analysis. These columns contain sulfonated polystyrene resins in the Calcium (87C), Hydrogen (87H), and Lead (87P) forms, and provide a wide range of selectivities for carbohydrate and organic analysis. They are widely used in the food and beverage industries for analysis of sweeteners, corn and cane sugars, fruit juices, soft drinks, beer and dairy products.

Supplier: VARIAN

The PolarGel range is ideal for use with polar solvents, such as dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO), and for solvent combinations such as tetrahydrofuran with water.

Supplier: VARIAN

These columns are ideal for the anion exchange HPLC separations of proteins and deprotected synthetic oligonucleotides under denaturing conditions.

Supplier: VARIAN

These UV-Visible calibration standards and kits provide an inexpensive and time-saving solution for calibrating and qualifying UV-Vis instrumentation.

Supplier: VARIAN

Système de chromatographie en phase gazeuse, O-ring, McDowell 2-112-S0604-70

Supplier: VARIAN

EZ-Guard columns combine a FactorFour column with a built-in guard column.

Supplier: VARIAN

Aqueous polymers for GPC/SEC.

Supplier: VARIAN

The ProSEC 300S column is specifically designed as a single column solution for globular protein analysis. The pore size selection and optimisation provides an extended linear resolving range so that this single column can be used for analysis across the full range of globular proteins.

Supplier: VARIAN

Bond Elut™ SAX is a strong anion exchange sorbent ideally suited for the extraction of compounds such as carboxylic acids, which may not retain effectively on weak anion exchange sorbents. The sorbent is supplied in the chloride counter ion form. You can modify the selectivity of the phase by replacing the chloride ion with other anions, such as acetate and hydroxide.

Supplier: VARIAN

Graphite tubes are quality tested to ensure each batch passes our demanding performance specifications for contamination, sensitivity, precision, electrical resistance and lifetime.

Supplier: VARIAN

Gas sampling bags in Tedlar.

Supplier: VARIAN

PoraBOND U is a highly stable polar-bonded porous polymer with the maximum temperature extended from 190 to 300 °C.

Supplier: VARIAN

Bond Elut™ EWP is based upon standard particle size silica but with 500 Å pores to allow more efficient extraction of large molecules (>15000 MW), which are typically excluded from standard porosity silica phases.

Supplier: VARIAN

Ideal as a confirmation column for reliable results.

Supplier: VARIAN

Native silica is generally regarded as the most polar SPE sorbent available. Bond Elut™ SI is particularly effective at separating compounds with a very similar structure. Applying the analytes in a non-polar solvent, then increasing the solvent polarity by increasing the concentration of a polar modifier, such as THF or ethyl acetate, delivers effective separations.

Supplier: VARIAN

GC installation kit with renewable gas purifier

Supplier: VARIAN

PLOT PT columns have an integral particle trap at each end, to eliminate the bother of connecting separate traps, and enable GC/MS with leak-free operation and no anxiety.

Supplier: VARIAN

Bond Elut Plexa PAX 30 mg tubes for VersaPlate

Supplier: VARIAN

Bond Elut™ C18 OH is a non-end capped version of the octadecyl bonded phases that enables the silanols on the silica surface to be more active. This low-load C18 has well-controlled silanol activity that permits the fractionation of metabolites and enhances retention of basic compounds compared to an endcapped C18. The pore size makes it a good choice for peptide extraction.

Supplier: VARIAN

Solid Phase Extraction (SPE) plate, SPEC 96-well plate, Sorbants pour échanges ioniques, SAX, 15 mg

Supplier: VARIAN

La colonne CP-Sil PONA CB fournit une analyse précise des paraffines, oléfines, naphtalènes et substances aromatiques dans les mélanges d'hydrocarbures complexes.

Supplier: VARIAN

Increase flexibility and capabilities of spectrophotometers thanks to certified calibration and installation cells for optimum optical performance in any application.