Hello everyone,

I am experiencing reduced peak area/height of butanol on my Nexis GC. The problem aroused suddenly, and I can't figure out why. It is causing issues in manner that I can't analyze 5% of butanol anymore (peak is not showing on chromatogram). I am analyzing mixtures of organic solvents from v/v 0,05 % up to v/v 100%. All other peaks are showing good result. Some suggestions why are/height of specific analyte would suddenly reduce.

Thank you for reading.