Combined GC and sniffing port analysis of volatile compounds in rubber rings mounted o beer bottles

摘要

For product development reasons two types (A and B) of rubber rings, used on clasps of swing top beer bottles, Were investigated for the presence of volatile com- pounds, which could affect the taste/odour of the packed beer due to ( vapour phase) migration. Samples were incubated under different conditions and, after dynamic headspace sampling, analysed by combined GC and sniffing port analysis. Compounds were also Identified by GC-MS. The main differences were Located in the presence of isobutene isomers in Ring Type A, which were absent in Ring Type B.