ID 2.0 - 3.0 - 4.0 and 4.6 mm
 Stainless Steel
 Length 13 - 20 - 33- 40 - 50 - 60 - 75 - 100 - 125 - 150 - 200 - 250 and 300 mm
 Endfittings Valco 1/16 inch ID


General flow rates for Analytical Columns

 2.0 mm ID 200 µl/min
 3.0 mm ID       
 500 µl/min
 4.0 mm ID
 1 ml/min
 4.6 mm ID 
 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.



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 the same stationaty phase for the GUARD column or a stationary phase that has less retention than the main  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, e.g. 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:




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