Analytical Columns

Diameter : 2.0 mm, 3.0, 4.0 and 4.6 mm ID

Length     : 13 mm, 20, 30, 33, 40, 50, 60, 75, 100, 125, 150, 200, 250 and 300 mm

General flow

2.0 ID  (mm)    : 200 µl/min

3.0 ID  (mm)    : 500 µl/min

4.0 ID  (mm)    : 1 ml/min

4.6 ID  (mm)    : 1 - 1.5 ml/min

GUARD columns

For microbore and analytical columns Dr. Maisch provides a High Quality and Cost Effective Cartridge GUARD system:

- The system consists of a HOLDER with replaceable GUARD CARTRIDGES

- The cartridges are High Pressure packed (plates) with a Stationary Phase of Choice

- Dr. Maisch has a large number of phases available (see catalogue or pricelist)

- Guards are available in lengths of 5, 10 and 20 mm and diameters up to 4.6 mm.

Note:

The purpose of a GUARD or PRE-COLUMN is mainly to retain (”scavenge”) strong-bonding components. It does not strictly need to consist of the same stationary phase as the main column that is used for the separation.

A good strategy is to use a stationary phase that has less retention than the separation column phase that is used.

For instance on a C18 separation columns the pre-column can be a C18 material with a lower CARBON CONTENT, a C8, or C4 material.

UNIVERSAL Stand-Alone holder

Female fittings on both ends. The stand-alone (also named INDIRECT) holder is connected by a column connector or SS/PEEK tubing. Examples:

Holder for 0.3 – 1.0 mm ID Cartridges: