179453 Results for: "Merck"

Supplier: Merck

Sodium borohydride, fine-granular for synthesis, Sigma-Aldrich®

Supplier: Merck

For full details of specification and hazards please see www.vwr.com or the VWR Chemicals catalogues

Supplier: Merck

Nitric acid 65%, Suprapur® for trace analysis, Supelco®

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: Merck

p-Xylene reference substance for gas chromatography, Supelco®

Supplier: Merck

Quick tests, visual colour comparison.

Supplier: Merck

trans-Anethole, Sigma-Aldrich®

Supplier: Merck

EMSURE® grade solvents are suitable for a broad spectrum of classical lab applications, and are frequently used in regulated and highly demanding lab applications. EMSURE® provides worldwide best and most extensive product specifications. We declare our EMSURE® range to be in compliance with the ACS, with the reagent part of the European Pharmacopoeia (Reag. Ph Eur) and also with the ISO standards.

Supplier: Merck

Zinc chloride, EMSURE® Reag. Ph. Eur., ACS, ISO for analysis, Supelco®

Supplier: Merck

Coupling TLC plates to mass spectrometry is a new field of high interest, which will contribute strongly to the progress of planar chromatography. The MS-grade plates are much cleaner than standard TLC/HPTLC plates providing higher sensitivity and reduced background signals. This allows trace analysis with mass spectrometry detection in lower nanogram range.

Supplier: Merck

Hafnium Standard, 1000 mg/L, Certipur®, Supelco®, Hafnium, Matrix: 7% HCl, Application: ICP standards

Supplier: Merck

Ammonium dihydrogen phosphate, EMSURE® ACS, Reag. Ph. Eur. for analysis, Supelco®

Supplier: Merck

Test kits for quick, semi-quantitative analysis in situ, without the expense of transporting samples to the laboratory. Simple step by step illustrated instructions mean the kits can be used without special chemical training.

Supplier: Merck

Phosphate standard, Titrisol®, 1000 mg/l, Titrisol®, Supelco®, Contents: H₃PO₄ in water, Application: Ion chromatography standards

Supplier: Merck

Bis(2-ethylhexyl)phosphate for synthesis

Supplier: Merck

All Spectroquant® test kits can be used with the Prove range of spectrophotometers and Nova 60/60A instruments. Tests can be used not only on photometers and spectrophotometer from Merck, but also on photometers and spectrophotometers from other suppliers (programming details available on request). Spectroquant® cell test kits.

Supplier: Merck

Ammonium sulphate, EMSURE® ISO, ACS, Reag. Ph. Eur. for analysis, Supelco®

Supplier: Merck

n-Pentane ≥99.8%, SupraSolv® for GC-ECD/FID, Supelco®

Supplier: Merck

N,N-Dimethylformamide, SupraSolv® for gas chromatography, Supelco®

Supplier: Merck

All the individual steps associated with solid phase extraction can be carried out using the LiChrolut® extraction unit. This transparent and vacuum-suitable unit, made of glass, can be used to prepare up to 12 samples simultaneously.

Supplier: Merck

Pyridine-2,6-dicarboxylic acid for synthesis, Sigma-Aldrich®

Supplier: Merck

Mercury (II) oxide, red for analysis, Supelco®

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: Merck

Benzyl chloride for synthesis, Sigma-Aldrich®

Supplier: Merck

Quick tests, visual colour comparison.

Supplier: Merck

1,4-Bis(hydroxymethyl)cyclohexane (mixture of cis and trans isomers)

Supplier: Merck

Guaiacol for synthesis, Sigma-Aldrich®

Supplier: Merck

Allyl alcohol for synthesis, Sigma-Aldrich®

Supplier: Merck

Chloroform-[D₁] (99.8% D) for NMR spectroscopy, Sigma-Aldrich®

Supplier: Merck

(4-Carboxybutyl)triphenylphosphonium bromide, Sigma-Aldrich®