This Information Applies To: Agilent 7697A Headspace Sampler
The transfer line will need to be replaced if it breaks at the valve, the inlet or in the middle of the transfer line. The previously broken liner will need to be removed and new one installed. You may experience leak-like symptoms or poor/no chromatography.
Steps to Follow
Removal of the old transfer line from the GC inlet and valve assembly
|Tips: If a section is stuck, you can use compressed air to blow it out or thread a ProSteel line through carefully to push out the broken liner pieces|
Installation of fused silica tubing or ProSteel tubing
Tips: If utilizing ProSteel and intend to operate the transfer line over 200 °C or higher, then you must utilize the protective sleeve. Slide the protective sleeve over the tubing before installing into transfer line
Installation of the transfer line into the valve
Assemble the 3/16- inch nut and polyimide ferrule onto the fused silica tubing. (See Figure 4). Polyimide ferrule is easy to loose off the end of the fused silica tubing before installing it into reducer.
Install the transfer line into the 1/4 - inch nut using the 3/16- inch internal reducer. (see Figure 5).
If possible, leave the existing 1/4- inch nut and ferrule in place and install the new fused silica into it using a new ferrule and the existing 3/16- inch nut.
Gently slide the fused silica tubing into the internal reducer until it bottoms. Tighten the 3/16- inch nut finger tight, then an extra 1/4- turn. Test the connection by gently pulling on the transfer line. The transfer line should not slide out of the internal reducer.
To prepare the GC interface end of the transfer line
Tips: It is important that the ceramic column cutter has one side dedicated to only making contact with the column and the other side dedicated to riding on the edge of the flexible metal ferrule. This preserves the ceramic edge sharpness, which is necessary for making good column cuts.
Attach the transfer line to the accessory
Confirmation: Utilize leak and restriction test to verify that system is leak free before performing test injection.
|Learn how to effectively maintain your 7697A Headspace Sampler :
SI-7697-2100sV3 - Agilent 7697A Headspace Sampler Operation and Maintenance e-learning course available from Agilent education