I recently took a job where I take soil flux samples on a regular basis. We're monitoring CO2 for the most part with a licor 850, but sometimes CH4 too with a licor 7810 iirc.

I don't really know what I'm doing. I'm going through the motions but I don't fully trust the data that's coming out. It looks right, but we have a custom built setup and can't use soil collars or the fancy fully automated licor domes. I tried performing a DIY leak test today and left more confused than when I started. Can anyone point me to some resources on proper sampling technique and equipment maintainance, or perhaps a proper way to perform a leak test, if any?

Thanks