Chromatography Forum

Hello I have a 2695 system with a 2414 detector and everything I have read says the detector should be a few degrees warmer than the columns.

What about when running the columns at 70°C but the detector only goes to 55°C, do you do anything clever or is there no choice but to just accept that the detector is cooler than the columns in these cases?

Thank you.

The reason for setting the detector temperature higher than the column temperature is to have the best thermal control in the detector, to prevent drift and excessive noise. Since you can't get there with the possible settings, you need to insulate the line from the column/column oven to the detector VERY well, so that the column oven can take over the temperature control. Alternatively, you can attempt to do the exact opposite, and leave the tubing between the column and the detector in an active room temperature air stream to cool it down, and let the heater in the detector do its job. Don't know which will work better.