Analyzing Differences in Freshness of SA-1 Hops by Headspace Solid-Phase Microextraction Gas Chromatography–Mass Spectrometry Combined with Chemometrics

• DOI: 10.1094/asbcj-2017-3238-01
• Publication Date: 2017-07-25T08:59:51Z
• Authors: Zechang Liu; Liping Wang; Yumei Liu
• Keywords: Chemometrics; Solid-Phase Microextraction; Humulus lupulus; Terpene

SA-1 hops are fine aroma that have played important roles in the brewing industry China and abroad. The objective of this study was to use headspace solid-phase microextraction gas chromatography–mass spectrometry combined with chemometrics determine mechanism by which flavor composition volatile components change a freshness-dependent manner. Thirty common were identified, most contributed significantly aroma. results showed chemical stored fresh varied; there decrease amount terpenes an increase oxygenated compounds hops, indicating significant changes had occurred during storage. Analysis variance two batches differed significantly; cluster analysis also divided into groups. Principal component generated simple classification reflected different freshness certain principal indices. Seven represented indices whereas nine those hops. odor fruity, herbal woody.