"Merck"

Supplier: Merck

Ethylammonium chloride, Sigma-Aldrich®

Supplier: Merck

Benzyltriethylammonium chloride for synthesis, Sigma-Aldrich®

Supplier: Merck

Lanthanum(III) oxide, Supelco®

Supplier: Merck

Fast method development of complex samples across the pH range from 1,5 to 10,5 with different mobile phases and temperature conditions.
Purospher® STAR RP-18 endcapped HPLC columns are designed for universal use. Basic, neutral and metal-chelating compounds can easily be separated with simple mobile phases – naturally without peak tailing. Thanks to its outstanding performance and stability, Purospher® STAR RP-18 endcapped offers maximum flexibility in method development. Robust methods can be developed over the entire pH range from 1,5 to 10,5. High pH-stability allows the separation of strongly basic compounds with alkaline eluents. The combination of high purity silica, best all-round retention characteristics, outstanding pH stability up to pH 10,5, and suitability for up to 100% aqueous mobile phases, make Purospher® STAR RP-18 endcapped an all-round top performance column, almost universal in its range of applications.

Supplier: Merck

Cyanuric acid for synthesis, Sigma-Aldrich®

Supplier: Merck

2-(Dimethylamino)-ethanol for synthesis, Sigma-Aldrich®

Supplier: Merck

Monolithic silica technology: A new age in chromatography. Chromolith® columns are based on silica so existing methods can be easily transferred with only minimal investment in new method development work. 'Sol-Gel' technology allows highly porous monolithic rods of silica to be formed. These feature a bimodal pore structure provides a unique combination of macropores and mesopores.

Supplier: Merck

Sodium hydroxide 30% in aqueous solution, Suprapur® for trace 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 5 typical wavelengths are identified. Furthermore the transmittance is specified in accordance with Reag. Ph Eur and ACS.

Supplier: Merck

Potassium hexacyanoferrate(III), EMSURE® ACS, Reag. Ph. Eur. for analysis, Supelco®

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. Merck declare the 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

Methylstyrene (mixture of isomers) stabilised for synthesis, Sigma-Aldrich®

Supplier: Merck

Tetrabutylammonium bromide ≥99.0% (by argentometric titration) for synthesis, Sigma-Aldrich®

Supplier: Merck

Charcoal activated, granulated, extra pure, Ø ∼1,5 mm

Supplier: Merck

Potassium sulphide (K2Sx), EMSURE® for analysis, Supelco®

Supplier: Merck

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