采用顶空固相微萃取技术对羊乳和牛乳挥发性化合物进行萃取,再经气相色谱-质谱联用仪检测。从羊乳中共检出49种挥发性化合物,主要由酸类、烃类、酮类和芳香族类化合物组成;牛乳中共检出33种挥发性化合物,主要由酸类、烃类、醇类和酮类化合物组成。羊乳和牛乳中检出22种相同化合物,其中酸类7种、烃类4种、芳香族类3种、酯类2种、酮类2种、醇类1种、醛类1种和其他类2种。羊乳中的挥发性成分,尤其是挥发性酸类化合物比牛乳更为复杂。

The volatile compounds of the goat milk and cow milk were extracted by head space solid phase micro extraction(HS /SPME),separated and identified by gas chromatography-mass spectrometry(GC /MS).The results showed that 45 compounds were obtained from goat milk,mainly consisting of acids,hydrocarbons,ketones,and aromatic.33 compounds were obtained from cow milk,mainly consisting of acids,hydrocarbons,alcohols,and ketones.Nineteen of them were the same components including acids(7 kinds),hydrocarbons(4 kinds),aromatic(3kinds),esters(2 kinds),ketones(2 kinds),alcohols(1 kinds),aldehydes(1 kind),and other compounds(2kinds).Volatile component of goat's milk was more complex than that of cow's milk,especially in volatile acids.