Chromatography Forum

Hi; i use GC-MS/MS (Thermo). It has got PTV liner (2mmx2,75x120 Baffle liner). How can i clean this liner?
Thank you for help.

You can try soaking it in aggressive and dangerous chemicals, rinsing it very thoroughly with expensive solvents and then re-deactivating it but the results will not be as good as a new one, and the cost in chemicals and time makes it barely (if at all) worthwhile unless you have a lot of liners that can be done as a batch. Liners are consumables, swap it for a new one.

Peter

PTV liners can be a bit expensive - and prices vary a good bit between vendors. While I am not a proponent of cleaning are resuing liners, I have a drawer full of dirty PTV liners for "just in case" - but so far the project budget has allowed me to keep purchasing PTV liners.

With a PTV liner, you are intentionally putting your sample onto the surface inside the liner - and I assume the vendor of lines is able to control what happens with that surface better than I can during a cleaning and treatment process.

We have cleaned normal liners by either solvent soaking, acid soaking or even high temperature in a muffle furnace before solvent rinsing. Each work well depending on the contaminate present.

We also re-silanize the liners after cleaning. But we are also running enough that we change the liners in 21 injections ports on a daily basis so it sort of pays us to reclean ours a few times each before purchasing new ones.