"Merck"

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Reagents for Karl Fischer titrations, Aquastar®, Supelco®

Supplier: Merck

The Aquastar® range is designed to provide reagents for the determination of water by Karl Fischer titration of a wide range of substrates and by a variety of methodologies. These include reagents for one- or two-component systems; combined coulometric reagents; solvents for oils and fats; reagents and solvents for determination of water in ketones and aldehydes. Calibration standards are also available.

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1-Propanol, LiChrosolv® for HPLC, Supelco®

Supplier: Merck

1-Propanol, LiChrosolv® for HPLC, Supelco®

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Toluene, SupraSolv® for GC-ECD/FID, Supelco®

Supplier: Merck

SupraSolv® ECD and FID is specially developed for gas chromatography in combination with ECD (Electron Capture Detetor) and FID (Flame Ionization detector). SupraSolv® solvents offer the largest specified retention time range, a clear baseline and a minimal signal-to-noise ratio leading to reliable and reproducible analysis results.

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Test Kits, Photometric, COD Cell Tests for seawater / high chloride contents, Spectroquant®

Supplier: Merck

COD Cell Tests where customers can measure COD in samples of seawater or unlimited chloride levels.

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Buffer solutions, according to EP and USP, Certipur®

Supplier: Merck

Buffer solutions intended for extremely precise calibration, qualification and monitoring of pH instruments, and for testing other buffer solutions.

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n-Hexane, LiChrosolv® for liquid chromatography, 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 minimises the gradient effect of the solvent involved.

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Acetonitrile, SupraSolv® for gas chromatography, Supelco®

Supplier: Merck

Acetonitrile, SupraSolv® for gas chromatography, Supelco®

Sustainable Options Available

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Isohexane (mixture of isomers), SupraSolv® for gas chromatography, Supelco®

Supplier: Merck

Isohexane (mixture of isomers), SupraSolv® for gas chromatography, Supelco®

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Hyamine® 1622 0.004 mol/l, Titripur® volumetric solution, for the determination of anionic tensides, Supelco®

Supplier: Merck

Hyamine® 1622 0.004 mol/l, Titripur® volumetric solution, for the determination of anionic tensides, Supelco®

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myo-Inositol, Millipore®

Supplier: Merck

myo-Inositol, Millipore®

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N-Lauroylsarcosine sodium salt for synthesis, Sigma-Aldrich®

Supplier: Merck

N-Lauroylsarcosine sodium salt for synthesis, Sigma-Aldrich®

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L-Phenylalanine, Sigma-Aldrich®

Supplier: Merck

L-Phenylalanine, Sigma-Aldrich®

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HPLC columns, Chromolith® DIOL

Supplier: Merck

Chromolith® DIOL columns are useful as an intermediate polarity media between C18 and silica. Diol functionalised media is less polar and can have different selectivity. Chromolith® DIOL can be used with a wide range of solvents in both normal and reverse phases. In normal phase mode, the diol phase provides an alternative selectivity compared to silica whilst additionally demonstrating longer retention times that help to obtain separation. In reverse phase mode, compounds such as water-soluble vitamins, sugars or amino acids are easily baseline separated using simple mobile phases. Chromolith® DIOL columns have long lifetimes within pH range of 2,5 to 7,5, high matrix tolerance and speed of analysis.