Chromolith NH2 5-4.6 Guard Cartridges, 130 A, 2 um, 4.6 x 5 mm, 3 Pieces - 152030

Merck Chromolith® NH2 5-4.6 Guard Cartridges, 130 Å, 2 µm, 4.6 mm I.D. x 5 mm Length, 3 Per Pack

Product Number: 152030

Analytics and Sample Preparation > Analytical Chromatography > Analytical HPLC > Chromolith® HPLC Columns>Chromolith® Monolithic HPLC Columns > Chromolith® Guard Cartridges and Cartridge Kit > Chromolith® NH2 5-4.6 guard cartridges (3 pieces)

Although the Chromolith® columns are well known for their robustness and longevity, guard columns are available to prolong the lifespan of Chromolith® analytical columns even further. These guard cartridges require a special holder.

Chromolith® aminopropyl-modified columns possess medium polarity, between those of bare (normal-phase) silica and reversed-phase silica. Consequently, they display hydrophilic as well as hydrophobic properties, and can be used under both reversed-phase and normal-phase conditions. However, retention is weaker than on silica or RP supports. In acidic solutions, the NH2 groups are protonated (-NH3 + X– ) and display the characteristics of a weak anion exchanger. Hence, the columns can also be used as ion exchangers. Chromolith® NH2 columns offer high matrix tolerance and analysis speed, as well as an extended lifetime within the pH range of 2.5 to 7.5. These columns are suitable for the separation of anions, organic acids, and carbohydrates (mono and disaccharides, such as fructose, glucose, sucrose, maltose and lactose).

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