10870 Résultats pour : "nmr solvent bdh"

Supplier: Thermo Fisher Scientific

1-Phénylazo-2-naphtol, pur

Supplier: Merck

With their high degree of UV transmittance, low particle count, low acidity and alkalinity and low evaporation residue level, LiChrosolv® solvents are ideal for reproducible separations. Since separations are normally carried out under gradient conditions in analytical HPLC, we offer solvents in "gradient grade" as well as "isocratic grade". This enables to minimize the gradient effect of the solvent involved.

Supplier: SIGMA ALDRICH MICROSCOPY

Sudan I is a lysochrome, a diazo-conjugate dye, used as an industrial dye, added to products such as waxes, oils, petrol, solvents and polishes. Sudan I is a category three carcinogen previously, now banned, used to colour certain foodstuffs. It can be used as a diagnostic assay manufacturing, hematology, histology.

Supplier: LGC Standards PROMOCHEM

Purity estimate obtained by quantitative NMR against an internal standard of dimethyl sulphone is 84,6 ± 1,5% mass fraction, (95% coverage interval). Supporting evidence is provided by HPLC with UV detection, Karl Fischer analysis and theromogravimetric analysis.

Supplier: Merck

With their high degree of UV transmittance, low particle count, low acidity and alkalinity and low evaporation residue level, LiChrosolv® solvents are ideal for reproducible separations. Since separations are normally carried out under gradient conditions in analytical HPLC, we offer solvents in 'gradient grade' as well as 'isocratic grade'. This minimises the gradient effect of the solvent involved.

Supplier: Avantor

These filters are made from 100% PEEK.

Supplier: Merck

With their high degree of UV transmittance, low particle count, low acidity and alkalinity and low evaporation residue level, LiChrosolv® solvents are ideal for reproducible separations. Since separations are normally carried out under gradient conditions in analytical HPLC, we offer solvents in 'gradient grade' as well as 'isocratic grade'. This minimises the gradient effect of the solvent involved.

Supplier: Merck

Accurate analytic results in UV/Vis and infrared spectroscopy depend on the use of very pure solvents for sample preparation. The Uvasol® solvents range has been specially designed for spectroscopy and other applications requiring solvents of the highest spectral purity. The refinement process allows a greater degree of security in applications and avoids misinterpretation of analytical results caused by traces of UV, IR and fluorescence contamination. Uvasol® solvents offer best UV transmittance. In all specifications the minimum transmittance for five typical wavelengths are identified. Furthermore the transmittance is specified in accordance with Reag. Ph. Eur. and ACS.

Supplier: Thermo Fisher Scientific

1-(2,4-Diméthylphénylazo)-2-naphtol

Supplier: TCI

Quinizarin green ≥98.0% (sur base azote total)

Supplier: VWR Chemicals

n-Heptane ≥99.0%, AnalaR NORMAPUR® pour analyses

Supplier: Merck

Accurate analytic results in UV/Vis and infrared spectroscopy depend on the use of very pure solvents for sample preparation. The Uvasol® solvents range has been specially designed for spectroscopy and other applications requiring solvents of the highest spectral purity. The refinement process allows a greater degree of security in applications and avoids misinterpretation of analytical results caused by traces of UV, IR and fluorescence contamination. Uvasol® solvents offer best UV transmittance. In all specifications the minimum transmittance for five typical wavelengths are identified. Furthermore the transmittance is specified in accordance with Reag. Ph. Eur. and ACS.

Supplier: Restek

Organic Standard, Residual solvents class 2 mix A, 1 ml/ampoule

Supplier: DWK Life Sciences

Vials are manufactured from 33 expansion, low extractable borosilicate glass. These glass Solvent-Saver™ vials are dimensionally smaller than conventional scintillation vials, permitting a reduction in the amount of solvent required.

Supplier: TOSOH Bioscience

Toyopearl resins can be used in organic solvents or mixtures of organic solvents and water. The compatibility of DMF with Toyopearl also permits the separation of hydrophobic substances such as polystyrenes.

Supplier: Merck

Accurate analytic results in UV/VIS and infrared spectroscopy depend on the use of very pure solvents for sample preparation. The Uvasol® solvents range has been specially designed for spectroscopy and other applications requiring solvents of the highest spectral purity. The refinement process allows a greater degree of security in applications and avoids misinterpretation of analytical results caused by traces of UV, IR and fluorescence contamination. Uvasol® solvents offer best UV transmittance. In all specifications the minimum transmittance for 5 typical wavelengths are identified. Furthermore the transmittance is specified in accordance with Reag. Ph Eur and ACS.

Supplier: TCI

1-(2,4-Diméthylphénylazo)-2-naphtol ≥95.0% (par UV/Vis)

Supplier: Apollo Scientific

Cleaning and coating solvent

Supplier: VWR Chemicals

n-Heptane ≥99%, HiPerSolv CHROMANORM® pour HPLC

Supplier: MACRON AVANTOR BRAND

n-Heptane, ChromAR® pour HPLC, Macron Fine Chemicals™

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: Merck

Accurate analytic results in UV/Vis and infrared spectroscopy depend on the use of very pure solvents for sample preparation. The Uvasol® solvents range has been specially designed for spectroscopy and other applications requiring solvents of the highest spectral purity. The refinement process allows a greater degree of security in applications and avoids misinterpretation of analytical results caused by traces of UV, IR and fluorescence contamination. Uvasol® solvents offer best UV transmittance. In all specifications the minimum transmittance for five typical wavelengths are identified. Furthermore the transmittance is specified in accordance with Reag. Ph. Eur. and ACS.

Supplier: Agilent

Solvent selection valve bridge tube

Supplier: VELP SCIENTIFIC

A fully automated and cloud enabled solvent extractor capable of a high sample throughput, offering state-of-the-art technology for a fast, precise and accurate extractions in complete safety according to Randall or Twisselmann techniques.

Supplier: Merck

With their high degree of UV transmittance, low particle count, low acidity and alkalinity and low evaporation residue level, LiChrosolv® solvents are ideal for reproducible separations. Since separations are normally carried out under gradient conditions in analytical HPLC, we offer solvents in "gradient grade" as well as "isocratic grade". This enables to minimize the gradient effect of the solvent involved.

Supplier: Apollo Scientific

Alternative solvent to benzene which is less toxic.

Supplier: Merck

With their high degree of UV transmittance, low particle count, low acidity and alkalinity and low evaporation residue level, LiChrosolv® solvents are ideal for reproducible separations. Since separations are normally carried out under gradient conditions in analytical HPLC, we offer solvents in "gradient grade" as well as "isocratic grade". This enables to minimize the gradient effect of the solvent involved.

Supplier: Roth Carl

1-Bromopropane

Supplier: Merck

MilliporeSigma™ solvent-resistant stirred cells, for 47 mm membranes is used for protein desalting, purification and concentration.

Supplier: USP

USP Reference Standards are specified for use in conducting official USP–NF tests and assays. USP also provides Reference Standards specified in the Food Chemicals Codex as well as authentic substances—high-quality chemical samples—as a service to analytical, clinical, pharmaceutical and research laboratories. To confirm accuracy and reproducibility, USP Reference Standards are rigorously tested and evaluated by multiple independent laboratories including USP, commercial, regulatory, and academic labs. USP also provide publicly available, official documentary standards for pharmaceutical ingredients in the USP–NF that link directly with our primary reference standards.