The solid phase microextraction gas chromatography-mass spectrometry (SPME/GC/MS) analytical technique has been used to study quantitatively the outgases from materials aging. The detective method and its conditions h...The solid phase microextraction gas chromatography-mass spectrometry (SPME/GC/MS) analytical technique has been used to study quantitatively the outgases from materials aging. The detective method and its conditions have been discussed. The effect of extracting time on analysis results and the linear correlations between the concentration and its peak areas and the repeatability of this method have been researched.. The correlative factors of quantitatively extracting some organic components have been received.展开更多
原料乳和乳制品中主要的游离中链脂肪酸(己酸、辛酸、癸酸)由于具有强烈的风味特征,是影响液体乳质量安全的重要化合物。实验采用顶空固相微萃取-气相色谱质谱法(headspace solid-phase micro extraction and gas chromatography mass s...原料乳和乳制品中主要的游离中链脂肪酸(己酸、辛酸、癸酸)由于具有强烈的风味特征,是影响液体乳质量安全的重要化合物。实验采用顶空固相微萃取-气相色谱质谱法(headspace solid-phase micro extraction and gas chromatography mass spectrometry,HS-SPME-GC/MS)联用技术结合内标法定量的测定液体乳中游离中链脂肪酸的方法。结果表明:此测定方法准确度高、操作简单、萃取效率高。展开更多
文摘The solid phase microextraction gas chromatography-mass spectrometry (SPME/GC/MS) analytical technique has been used to study quantitatively the outgases from materials aging. The detective method and its conditions have been discussed. The effect of extracting time on analysis results and the linear correlations between the concentration and its peak areas and the repeatability of this method have been researched.. The correlative factors of quantitatively extracting some organic components have been received.
文摘原料乳和乳制品中主要的游离中链脂肪酸(己酸、辛酸、癸酸)由于具有强烈的风味特征,是影响液体乳质量安全的重要化合物。实验采用顶空固相微萃取-气相色谱质谱法(headspace solid-phase micro extraction and gas chromatography mass spectrometry,HS-SPME-GC/MS)联用技术结合内标法定量的测定液体乳中游离中链脂肪酸的方法。结果表明:此测定方法准确度高、操作简单、萃取效率高。