Chromatography Forum

I would like to install a chiller on my Agilent 7683 autosampler (GC), but I really don't know where to start. If anybody has any suggestions I would really appreciate it.

Thanks!

Couldn't you just hook up a circulating, chilled water bath to the ports on the tray sections?

Maybe MT has only a 7683 tower; if there is a tray, just route chilled water through as Radish suggests, that's straightforward.

You would think it would be that straight-forward, but it isn't. Agilent recomends only 3% ethylene glycol through the tray - the chillers that I have looked at insist on using 50/50 ethylene glycol/water - to prevent the chiller from freezing up when trying to achieve around 4 degrees C at the tray. Also - there's a pressure problem. The lowest pressure output I've seen is 10psi, but Agilent suggests only 1.5-2.5psi at the tray or it could break and we would have water everywhere.
Any other suggestions??

I use a Fisher Isotemp 3006 circulator, before that used an ancient European-made one, don't know the output pressures. I'd guess Agilent's lawyers want to place practically all the liability on the end user.

There can be a very interesting effect when you chill the sample tray. I have heard stories where people have tried this in high humidity environments and have had water condense in the wells of the tray and sample vials float up out of the proper position. I have seen similar effects on other autosamplers, and most autosamplers that allow cooling have an enclosure to control condensation.