Chromatography Forum

Hello, I would like your opinion if is better:
GC/MS/MS Agilent 7890+Agilent 7000 (EI)
or
GC/MS/MS Agilent 7890+Waters Xevo TQS (APGC)
Someone knows which one is better?
Obviously waters is much more expensive.
Searcing on internet seems that APGC is much better than electronic impact.
Is it correct?
Thank you so much

Sorry we can't really comment as you have not defined "better"
If you give us an idea of the application , quatitative qualitative etc. it might help

If starting from scratch an EI GC/MS may be all you need and much cheaper.

If you already have an accurate mass TOF (and no GC/MS) with spare operating capacity you might consider buying an APi GC interface.

A Lamborghini Aventador is a better car in almost every respect than the compact you more likely drive. If going to the supermarket owning both you might still choose the compact as the "better" car for the application

I am currently using the Agilent 7000QQQ with EI mode and I believe it works very well. The only thing you lose with EI is the soft ionization that will produce the molecular ion in great abundance.

If you are wanting to do Pesticide work Agilent has a ready build setup for that including the MRM database so you have little setup work to do. If doing manual setup, the wizards work pretty well to step you through the process of optimizing for each analyte. I have not used the Waters instrument so I don't know how that system works so I can compare, only tell what I know of the Agilent.

The Agilent also works well as a standard single quad instrument so you can use it for that type of work also and not need another single quad instrument for doing normal type GCMS work. That is what I am doing with ours, running regular GCMS samples which is the bulk of our work, and also doing research and development work on running pesticides by MRM.

Sorry we can't really comment as you have not defined "better"
If you give us an idea of the application , quatitative qualitative etc. it might help

If starting from scratch an EI GC/MS may be all you need and much cheaper.

If you already have an accurate mass TOF (and no GC/MS) with spare operating capacity you might consider buying an APi GC interface.

A Lamborghini Aventador is a better car in almost every respect than the compact you more likely drive. If going to the supermarket owning both you might still choose the compact as the "better" car for the application

Of course I am not buying a gc/ms/ms for qualitative determinations...
We need a triple quad GC to perform pesticides determination (also in baby food) and dioxins and pcb in food and environmental samples. We are considering Waters APGC/XevoTQ-S and Agilent 7000. In your opinion which one is better?

The TQ-S with APGC will most likely perform substantially better than the 7000.