Capillary Column Butt Connectors

This device consists of a double-tapered ferrule and a stainless steel compression body with a threaded nut. Small (2.3 cm x 0.6 cm) and light (4.4 g with ferrule), it provides a gas tight seal without a change in column efficiency or inertness. The columns to be connected can have the same or different internal and external diameters. The butt connection is made inside the special double-tapered ferrule. The ferrule is then compressed within the housing. When the column ends are butted squarely and tightly together, the butt connector will not alter the chromatographic performance of your capillary columns. There is little or no dead volume and little chance of gas flow disruption by following these steps:

  • Make sure the bore of the ferrule is clean. Blow out any ferrule fragments with nitrogen. Using a magnifier, examine the column ends to be connected. Make sure each cut is clean and square. The two ends must butt squarely, without any gaps.
  • With white typewriter correction fluid, place a reference mark 1/4 inch from the end of the column with the larger bore. This mark will help you to confirm visually that the end of the column is centered within the 1/2 inch ferrule.
  • Place the ferrule inside the housing and loosely tighten the nut. Feed the unmarked column completely through the ferrule and out the opposite end. Cut off ~1 inch (25 mm) of the column to ensure no ferrule fragments are in the column. Draw the column back far enough to insert the marked column into the ferrule to the indicating mark. Tighten the nut about 1/8 turn past fingertight.
  • Press the ends of the columns together, observing the reference mark to make certain they butt together at the center of the ferrule. Tighten the ferrule to about 1/4-1/2 turn past fingertight. Gently pull on both columns to ensure they are secure. If they are loose, additional tightening is necessary.
  • Any undetected leaking connection, including this butt connection, can allow oxygen and water vapor to enter the system. Leak check the butt connector in the same manner as any capillary column connection. DO NOT USE LIQUID LEAK INDICATORS. Liquids can contaminate the capillary system. We recommend using a GOW-MAC® electronic leak detector. These thermal conductivity detectors are highly sensitive to trace amounts of hydrogen or helium, and will not contaminate the system.

Capillary Column Butt Connector

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23796 Capillary Column Butt Connector I.D. 0.4 mm, Supeltex M-2 ferrule, included
23804 Capillary Column Butt Connector body only (ferrules not included)

Capillary Column Butt Connector Nut

Replacement nut for the Capillary Column Butt Connector.

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23805 Capillary Column Butt Connector Nut 1/16 in. male hexagonal wrenchtight
23812 Capillary Column Butt Connector Nut 1/16 in. male knurled fingertight

Supeltex® M-2 Double-Tapered Ferrule

  • Max Temp: 350 °C
  • Composition: DuPont VESPEL SP-1 (100% polyimide)
  • Characteristics: High reusability

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22585 Supeltex® M-2 Double-Tapered Ferrule I.D. 0.25 mm, 0.10 mm to like I.D. column, pkg of 2 ea
23797 Supeltex® M-2 Double-Tapered Ferrule I.D. 0.4 mm, 0.10-0.25 mm to like I.D. column, pkg of 2 ea
22464 Supeltex® M-2 Double-Tapered Ferrule I.D. 0.5 mm, 0.32 mm to like I.D. column, pkg of 2 ea
22590-U Supeltex® M-2 Double-Tapered Ferrule I.D. 0.8 mm, 0.53 mm to like I.D. column, pkg of 2 ea
22465 Supeltex® M-2 Double-Tapered Ferrule I.D. 0.4-0.8 mm, 0.10-0.25 mm I.D. to 0.53 mm I.D. column (reducing), pkg of 2 ea
22596 Supeltex® M-2 Double-Tapered Ferrule I.D. 0.5-0.8 mm, 0.32 mm I.D. to 0.53 mm I.D. column, pkg of 2 ea
22466 Supeltex® M-2 Double-Tapered Ferrule I.D. 0.5-1.2 mm, 0.32 mm I.D. to 0.75 mm I.D. Column, pkg of 2 ea

Supeltex® M-2B Douoble-Tapered Ferrule

  • Max Temp: 350 °C
  • Composition: DuPont VESPEL SP-211 (75% polyimide, 15% graphite, 10% PTFE)
  • Characteristics: Conforms easily to capillary column, ensuring an effective seal and less chance of breakage.

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Description

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22453 Supeltex® M-2B Double-Tapered Ferrule I.D. 0.4 mm, 0.10-0.25 mm to like I.D. Column, pkg of 2 ea
22454 Supeltex® M-2B Double-Tapered Ferrule 0.32 mm to like I.D. Column, pkg of 2 ea, I.D. 0.5 mm
22591 Supeltex® M-2B Double-Tapered Ferrule I.D. 0.8 mm, 0.53 mm to like I.D. Column, pkg of 2 ea
22455-U Supeltex® M-2B Double-Tapered Ferrule I.D. 0.4-0.8 mm, 0.10-0.25 mm I.D. to 0.53 mm I.D. Column, pkg of 2 ea
22586 Supeltex® M-2B Double-Tapered Ferrule I.D. 0.5-0.8 mm, 0.32 mm I.D. to 0.53 mm I.D. Column, pkg of 2 ea
22456 Supeltex® M-2B Double-Tapered Ferrule I.D. 0.5-1.2 mm, 0.32 mm I.D. to 0.75 mm I.D. Column, pkg of 2 ea