324 Results for: "chromatography solvents"

Supplier: Restek

Stabilwax-MS columns ensure reproducible retention times from run to run, even with temperature cycling. When methods require trace analysis, this highly polar, low-bleed stationary phase produces excellent signal-to-noise levels. Ideal for food and flavor analysis (e.g., essential oils), fragrance and allergen analysis, as well as industrial solvent and chemical analysis.

Supplier: Agilent

Virtually equivalent to (50%-Phenyl)-methylpolysiloxane column. They are solvent rinsable and very low bleed mid-polarity columns ideal for GC/MS. They are suitable for CLP pesticides.

Supplier: Agilent

They are solvent rinsable and very low bleed mid-polarity columns ideal for GC/MS. They are suitable for CLP pesticides.

Supplier: Restek

General purpose columns for drugs, solvent impurities, pesticides, hydrocarbons, PCB congeners (e.g., Aroclor mixes), essential oils, semivolatiles.

Supplier: Restek

General purpose columns for solvent impurities, PCB congeners (e.g. Aroclor mixes), simulated distillation, arson accelerants, gases, natural gas odorants, sulphur compounds, essential oils, hydrocarbons, semivolatiles, pesticides, oxygenates.

Supplier: Agilent

These spray chambers and supplies are fully compatible with your PerkinElmer ICP-OES.

Supplier: Restek

These cartridges are manufactured using high density polypropylene and have polyethylene frits unless otherwise noted. Hydrophilic (polar) adsorbents used to extract hydrophilic analytes from nonpolar matrices, such as organic solvents (e.g., polar contaminants from sample extracts).

Supplier: Restek

General purpose columns for arson accelerants, essential oils, hydrocarbons, pesticides, PCB congeners (e.g. Aroclor mixes), sulfur compounds, amines, solvent impurities, simulated distillation, oxygenates, gasoline range organics (GRO), refinery gases.

Supplier: BUCHI

The three-piston pump module with a pulse-free flow rate from 2,5 to 250 ml/min guarantees fast separation at a maximum working pressure of 10 bar (145 psi) or 50 bar (725 psi) for isocratic or gradient mode. These pump modules are the core components of the Sepacore® chromatography systems. The chemically resistant and biocompatible pumps can be used with a wide range of organic solvents.

Supplier: Agilent

General purpose columns for solvents, sulfur compounds, oxygenated compounds, C1 to C3 isomers, methane, air/CO, and alkanes upto C12. Ideal for ethane, ethylene and ethyne separation.

Supplier: Thermo Fisher Scientific

For ultrahigh-resolution UHPLC analysis of synthetic oligonucleotides. These strong anion-exchange columns resolve full-length oligonucleotides from n–1, n+1, and other failure sequences not possible with other columns. Control the retention times and selectivity by choice of salt, pH, and solvent, and tailor the separation to the requirements of your different oligonucleotide analysis challenges.

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: Agilent

CrossLab snap top vials and caps provides a secure seal without crimping.

Supplier: VARIAN

The PL-SAX media are well suited for anion exchange HPLC separations of proteins, peptides, and deprotected synthetic oligonucleotides. Denaturing conditions of temperature, organic solvent, and high pH levels are used for the oligonucleotide separations.

Supplier: MP Biomedicals

MP EcoChrom™ Silica is used in adsorption and partition chromatography. It is not only suitable for separation of non-polar substances but also for solvent purification and all other applications where it is necessary to remove small quantities of polar impurities from a non-polar matrix.
MP EcoChrom™ Silica is an oxide of silicon+CS75.

Supplier: Honeywell Chemicals

Honeywell Chromasolv™ GC-headspace solvents:

Supplier: MACHEREY-NAGEL

The highly polymeric binder used for these sheets is stable in almost all organic solvents and resistant towards aggressive visualisation reagents. It is also completely stable in purely aqueous eluents.

Supplier: MACHEREY-NAGEL

CHROMABOND® PTS and CHROMABOND® PTL columns are designed for the separation of a two-phase mixture without a separation funnel.

Supplier: Thermo Fisher Scientific

Flat, 100% porous graphitic carbon (PGC) with selectivity for structurally similar compounds, offering separation of compounds with simple solvents. Hydrophobic reversed phase; normal phase adsorption; polar retention.

Supplier: CHIRAL TECHNOLOGIES

These columns allow chromatographers to employ essentially any organic solvent as mobile phase to develop methods for the most challenging separations. These columns are available in a variety of particle sizes and offer great speed and column resolving power. Columns packed with 3 µm CSPs offer high speed separations and a reduction in analysis time and cost per sample. Columns, packed with 3 µm particles, may be used in conventional HPLC units without significant loss in performance, even with the smaller column dimensions.

Supplier: Agilent

The 4100/4200 Microwave plasma-atomic emission spectrometer runs entirely on air, which means your lab can eliminate flammable and expensive gases. It's safer and more cost efficient than other spectrometers. The 4100/4200 MP-AES enables superior detection and can perform unattended multi-element analyses.

Supplier: HAMILTON BONADUZ

The PRP-X100 is a polymeric column packing for separation of inorganic and organic anions from 10 to 500 ppm. These columns can be used to separate ions at concentrations from 1 to 1000 ppm without suppression or elaborate preconcentration techniques. The highly inert polymeric support resists chemical attack from organic solvents and aqueous buffers (0 - 100% aqueous or organic; pH 1 to 13), effectively lengthening column life.

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: HAMILTON BONADUZ

These headspace syringes feature a unique Glue-Free (GF) needle attachment in combination with a High Dynamic (HD) plunger. They are designed specifically for PAL COMBI–xt® headspace autosamplers. Conventional headspace syringe needles are attached to the syringe glass body using glue (cement). Common problems are detached needles or ghost peaks due to low chemical inertness of the cement to solvents or limited resistance to higher temperature. These problems are addressed with the Glue Free High Temperature (HDHT) headspace syringes.

Supplier: VARIAN

Hi-Plex HPLC columns deliver improved efficiency, lower operating pressures and longer column lifetimes from monodispersed materials. With a range of ligand counter ions for optimum selectivity and resolution and materials matched to the USP definitions of media types L17, L19, L34 and L58, the Hi-Plex range is ideal for isocratic separations using water or dilute acid as the eluent. This simplifies your HPLC system requirements and eliminates the use of potentially hazardous organic solvents.

Supplier: HAMILTON BONADUZ

A fast, versatile HPLC column packing material. These columns rapidly and easily separate closely related alcohols and organic acids without column heating. The sulfonated poly(styrene-divinylbenzene) support separates samples by a mixed mode mechanism. A wide range of samples can be analysed with these columns because the selectivity of the column can be altered by changing the pH of the buffer or adding an organic modifier (methanol, acetonitrile) to the buffer. The stability to organic solvents makes it possible to analyse samples that have been too highly retained on conventional ion exclusion supports.

Supplier: PerkinElmer

General purpose columns with a highly versatile phase that is extremely rugged, exhibiting long column lifetime and high operating temperatures. Ideal for the analysis of non polar petrochemical samples, such as detailed hydrocarbon analysis, hydrocarbon gases, petroleum oxygenates, petroleum aromatics, fuels waxes, oils, sulphur compounds, mercaptains and carbon disulphide. It also an excellent phase for solvents, chemicals, flavours, fragrances, essential oils, air toxins, chlorofluorocarbons, pesticides and hydrocarbons.

Supplier: Thermo Fisher Scientific

The QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) technique is increasingly becoming the technique of choice for the extraction of pesticide residues in fruit, vegetables and other foods. The QuEChERS method offers the advantage of high recoveries, accurate results and high sample throughput, combined with the associated cost savings with low solvent and labour requirements. Yet the procedure is robust and rugged.

Supplier: Resonac

A complete range of general purpose gel permeation columns (GPC) packed with tetrahydrofuran (THF). Columns packed with other solvents are also available. Please enquire for further details.

Supplier: COLLECTION PREFIX HPLC

On-Line degassing has been shown to be more effective at removing dissolved gas from mobile phases than sonication or helium sparging. Up to five solvent lines can be degassed simultaneously by one unit. The extremely low volume of each PTFE AF channel (480 μl) offers very quick equilibration and very short start-up times.