Merck Purospher®

Purospher®

◈ Product Information

Purospher® HPLC columns are based upon a high-purity, metal free silica for excellent separations with very good peak symmetry.
The base material for Purospher® high-purity HPLC columns is made from tetraalkoxysilane.
Due to the absence of heavy metals in the silica matrix and in combination with a complete coverage of the silica surface, this stationary phase enables tailing-free chromatography of acidic, basic and chelating compounds. This is of particular advantage for method development.
The Purospher® product family comprises three different Purospher® HPLC packing materials:

► Purospher® RP-18
Purospher® RP-18 is polar endcapped and suitable for separations of strong basic or chelating compounds(no acidic compounds) and separations of hydrophilic compounds with a high percentage ofwater in the mobile phase.

► Purospher® RP-18 endcapped
Purospher® RP-18 endcapped is suitable for separations of complex samples with simple eluents.

► Purospher® RP-18 HC
Purospher® RP-18 HC is not endcapped with very good suitability for separation of polar, not basiccompounds e.g. explosives.

► Purospher® STAR
Purospher® STAR is the latest development of Merck's particulate HPLC sorbents and allows separationsof neutral, acidic, basic or chelating compounds. The excellent stability up to pH 10.5 allows the separation of strong basic compounds with alkaline eluents. The wide range of sorbents allows method development of all applications.
Available Purospher® STAR sorbents are: RP-18 endcapped (3μm or 5μm); RP-8 endcapped (3μm or 5μm); NH2, 5μm and Si, 5μm.

◈ Ordering Information



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