What settings for ECD when not in use?

Are you pulling the column to try and save on carrier gas cost? I keep column flow between 0.5-1 mL/min depending on the instrument and drop makeup flows to 15 mL/min while keeping everything hot. I've left the inlet hot and the detectors cold with those settings for months and signal returns to where it was after warming up for an hour or so.

If you aren't sticking it on a shelf or putting it to sleep for a long time I'd just keep it hot and use the lowest column flow setting your EPC will still hold pressure with.

This instrument is used mostly for FID analyses and the second injector is not working. That's the primary reason why the column will be disconnected most of the time. Also to reduce contamination of the ECD, but it sounds like that isn't a huge concern. Thanks for the suggestions.

Hello sassman ,

I wouldn't necessarily say it isn't a concern, as you would need to keep air and moisture out of the ECD if it's not in use.

For reference, the ECD manual is always a good reference tool. Pages 16 and 18 are referring to your current question, but it's good to have for future reference too.