固相微萃取技术(SPME)分析羊奶中挥发性化合物

Analysis of volatile compounds from goat milk by solid-phase microextraction

采用固相微萃取技术(SPME)提取羊奶中的挥发性化合物,经气相色谱质谱联用仪进行测定分析,实验结果表明,羊奶中挥发性化合物共检测到42种,主要成分为挥发性脂肪酸,酯类、醇和酮类,还含有一些其他挥发性化合物。其中挥发性脂肪酸有10种,主要由短链脂肪酸和中等长度碳链脂肪酸组成。酯类物质有16种,主要包括邻苯二甲酸二丁酯、邻苯二甲酸二乙酯、14-甲基-十五酸甲酯和己二酸二(2-乙基)乙酯等。另外挥发性醇类和酮类物质共7种,其它挥发性化合物9种。

The aim of this article was to use solid-phase microextraction to extract volatile compounds from goat milk,these volatile compounds were analyzed by gas chromatograph combination with mass spectrophotometer （GC-MS）.The results of experiment showed that a total 42 extracts, they mainly contained volatile fatty acids, esters, volatile compounds were identified from the sample alcohols, ketones and other volatile compounds.10 volatile fatty acids were found in these volatile compounds, composed by short chain fatty acids and medium chain fatty scids.16 esters mainly included Diethyl Phthalate, Dibutyl phthalate, Pentadecanoic acid, 14-methyl-, methyl ester and Hexanedioic acid, bis [2-ethylhexyl] ester.Otherwise, alcohlos and keptones were added up to 7 and other volatile compounds were 9.