Chromatography Forum

Hello all,

I have been using the ATD150 a lot recently and have been getting back a lot of impurities and unknown peaks. I recently found my trap had become very dirty and replaced it, expecting that to clean up the chromatogram, but the problem persists. I want to check if there is more contamination in the transfer line, but am unsure how to best go about cleaning it out.

Does anyone have any suggestions on how to clean the transfer line?

Buy:
1) deactivated fused silica column thats the same id as your gc column
2) ferrule for fitting in turbomatrix (see manual)
3) column union

Bonus: some 1/16" ptfe or pfa tubing to feed through the PE transfer lone, this will help protect you column when you feed it through. Ptfe fittings start to flow at 260C, do not go above 275 in your transfer line with the ptfe.

If you trap is visibly dirty, replace the transfer line. Lost thermally labile peaks, replace the transfer line.

@tdgcuser

Thanks for the suggestions, I will look into these!