Faculty Advisor

Kmiotek, Stephen J.


The goal of this project was to determine a methodology to accurately measure the percent ethanol of the beverages produced by Wachusett Brewery. Based on gas chromatograph tests, it was determined that using propanol as an internal standard and a Chaney adaptor provided accurate results. In addition, using a vial with a septum cap prevented ethanol evaporation from the sample and 597 Qualitative Filter Paper decarbonized the beer without absorbing ethanol. From the developed methodology using a gas chromatograph, Wachusett IPA was determined to be 5.2% ABV. Due to the multicomponent nature of beer, a density measurement, provided by a hydrometer and digital density meter, was not an accurate method to determine alcohol percent in Wachusett Brewery’s beverages.


Worcester Polytechnic Institute

Date Accepted

April 2015


Chemical Engineering

Project Type

Major Qualifying Project



Advisor Department

Chemical Engineering