顶空固相微萃取-气相色谱-质谱结合感官法对絮用原棉纤维异味成分的分析OA

In order to determine the odor component in filling raw cotton fibers,the volatile components in filling raw cotton fibers were analyzed by headspace solid phase micro-extraction with gas chromatography-mass spectrometry(HS-SPME-GC-MS)technology,and the relative contents of each component were determined.Then,the differences in key odor components and their contributions were quantitatively evaluated by relative odor activity value(ROAV).In order to further clarify the odor substances,filling raw cotton fibers were treated differentially by the hot air drying method,the organic solvent extraction method and the inorganic solvent extraction method,the chromatographic peak area change rate of key odor components was calculated,finally the odor components in filling raw cotton fibers combined with sensory evaluation was determined.The results showed there were 15 kinds of volatile components in filling raw cotton fibers,including aldehydes,alcohols,alkanes,ketones,acids,etc..Among them,the linear aldehydes decanal(ROAV=100.000)and nonanal(ROAV=25.720)were the main odor components.Benzyl alcohol(ROAV=0.377)and octanaldehyde(ROAV=0.520)could significantly enhance odor intensity through synergy.The study broke through the limitations of traditional olfactory discrimination methods with strong subjectivity and large errors,combined HS-SPME-GC-MS technology with sensory evaluation to accurately analyze the odor components in filling raw cotton fibers,laying the foundation for the development of subsequent odor removal processes.