Study On Extraction, Oxidation Resistance And Aaroma Component Of Hop Concrete

The hop plant (Humunus Lupulus L.)had been used in the brewage in thousands years, gave characteristic flavor and frank bitter of beer and increased antiseptic capability and anti-biological stability of beer. As forα-acid and flavonoids index, this experiement studied the extraction hop concrete by microraythis.As forα-acid loss percentage index, this experiement studied the dry method of hop. This experiement studied the antioxygen activity of hop concere. The main results were as follows:1 Asα-acid index, the optimal technical processing were:extracting 2 times, soaking 40min, liquid ratio 1:15, microwave time 25s, microwave power 40%, solvent concentration 60%.2 As flavonoids index, the optimal technical processing were:extractingof 2 times, soaking 40min, liquid ratio 1:20, microwave time 20s, microwave power 60%, solvent concentration 60%.3 In hops drying paper, study the drying hops in the process of placing the way, temperature and convection condition on drying rate andα-acid loss ratio impact, results showed that the three factors on the drying rate andα-acid loss ratio have a significant influenced. The best of fresh hops drying conditions are: hops should be put in place is the way the high value of temperature from 40℃, convection situation in check increases. Different temperatures through the drying hops to preserve the experiment, reached dry hops in the -20℃cryopreservation more appropriate.4 Through the microwave extraction of the orthogonal test to determine the antioxidant components of hops flower the optimum extract conditions was ethanol concentration 45%, liquid ratio 1:20, microwave power 80%, microwave time 30s. The antioxidant effects of hop concrete was 630.36.5 Through the GC-MS to analysis aroma component of dry hop,hop drop and hop concrete.The result showed that aroma component of different hop samples was almost same,but it had small differences.6 Through the ICP-MS to determin the fifteen kinds of heavy metals content of dry hop,hop drop and hop concrete.The results showed that heavy metals content of hop concrete was less than ohers'.