Glass insert type on GC Shimadzu 2010 :?:

[Irina]

Hi.

I'm wondering how can I chose the glass insert for Shimadzu GC 2010 and Shimadzu GC-MS QP 2010. Until now I was using the one that came with it (goose neck with glass wool on MS and without glass wool on GC - with ECD and FID), but know I have to order more and I'm thinking what is the difference between them. At what should I look when I have to choose one.

Thanks for any thoughts!

[Rolandas Plausinaitis]

Well, it all depends on Your samples and application (injection mode).

General info on the SHIMADZU liner types with short descriptions can be found here:
http://store.shimadzu.com/documents/GC- ... mables.pdf

Wool for some types of samples facilitates eveporation and wapour mixing while catching non-volatile components (or particles) of the injected sample. This way column is protected from contamination/degradation. Injection repeatability is considered to be better.

However very sensitive analytes (for example some pesticides) can be partially or completely destroyed during contact with the hot glass wool. In these cases liners without wool are used. Silanization also helps in such cases.

Theoretically You should test different types when developing method and then use the one which works best for the certain application.

[Irina]

Thank you very much for your advice