Longtime readers know I’m a big fan of Lost Spirits Distillery in central California. I’ve written about them extensively, with most of the hard science the result of long conversations with Bryan Davis, co-owner and master distiller. This is really wonky stuff: yeasts, acids, esters, and chemical analysis – true rum science.
Very recently, Bryan put up the first (of what hopefully will be several) pages on the Lost Spirits site where he shares the results of in-depth chemical analysis of pairs of rums, including annotated gas chromatographs. Titled “Trace Carboxylic Acid & Ester Origin in Mature Spirits”, it’s full of meaty observations like this:
This observation appears to confirm that the trace ester density is not only predetermined prior to the spirit entering the cask but that the distillation cuts and level of rectification has a massive effect on the final character of the aged spirit.