Abstract
To investigate the chemical and sensorial impact of dry hopping time on typical pale ale, a standardized beer was produced and separated into ten vessels. Nine vessels were dry hopped, and one vessel remained un-hopped as a control. Impact of dry hopping contact time was investigated over 96 h. Polyphenols and iso-α-acid t/c ratio were analyzed in both Young and Aged beer samples. Total polyphenol content generally increased in both young and aged treatments compared to controls. Analysis of the t/c ratio suggests that both Young and Aged beers were chemically preserved to some degree after approximately 12 h at the given dry hopping rate regardless of age. Within the Aged beer trials, 96 h of dry hop contact yielded a significant increase in t/c ratio compared to all other Aged trials. This suggests that a 4-day dry hop regime may yield additional oxidative protection of iso-α-acids in beers stored unrefrigerated for 30 days. Descriptive analysis was also performed with an 8-person, trained panel; however, beers were sensorially distinguished by their aging time as opposed to their dry hopping time.
Description
This article is published by MDPI distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Publisher
MDPI
Date of publication
6-2-2021
Language
english
Persistent identifier
http://hdl.handle.net/10950/4313
Document Type
Article
Recommended Citation
Titus, Bradley M.; Lerno, Larry A.; Beaver, Jordan; Byrnes, Nadia K.; Heymann, H.; and Oberholster, A., "Impact of dry hopping on beer flavor stability" (2021). Chemistry Faculty Publications and Presentations. Paper 2.
http://hdl.handle.net/10950/4313