DPPH-spectroscopy is used to determine the scavenging rate and estimate the extent of beer staling,as a result the scavenging rate show a high relativity with staling extent.

• 利用分光法测定啤酒对DPPH自由基的清除率,来表示啤酒的抗氧化能力,以评价其老化程度,结果显示清除率与老化程度之间有相当高的线性相关性。