How to calculate Ethanol concentration using Crowell and Ough, 1979 paper :

https://www.ajevonline.org/content/30/1/61

I'm using 2 ml distillate with 10 ml Potassium Dichromate and incubates at 60 C for 20 minutes, and then measurement at 600 nm Spectrophotometer.

P.S: If you have the original mentioned paper above, please send it to me