摘要
应用中空纤维膜液相微萃取技术（HF-LPME），及常规分析法与气相色谱一质谱（GC-MS）联用分别测定了3种浓香型白酒中的正己酸乙酯。两种方法都采用内标法定量，内标物为乙酸正戊酯。中空纤维膜液相微萃取的优化条件为：萃取溶剂为4．0扯L正己烷，搅拌速度为1000r／min，萃取时间为20min。中空纤维膜液相微萃取法及常规前处理分析法的线性范围分剐为25～400mg／L、5．0～500mg／L，检出限分别为0．25mg／L、0．03mg／L，加标回收率分别为83．7％～1189／6、78．4％～94．2％，相对标准偏差分别为9．4％～15．6％、3．5％～4．9％。
Hollow Fiber Liquid Phase Microextraction （HF-LPME） and the normal analysis methods were compared for the determination of ethyl caproate in three kinds of liquor by GC-MS with N-amyl acetate as the internal standard. The optimal HF-LPME conditions are as follows. 4.0 μL of N-hexane, 1 000 r/min of stirring rate and 20 min of extraction time. The results of HF-LPME and the normal analysis show that the calibration curves for ethyl caproate were linear in the range of 25～400 mg/L and 5.0～500 mg/L, respectively, by GC-MS. The limits of detection were 0.25 mg/L and 0～ 03 mg/L, respectively. The overall recoveries were 83.7%～118% and 78.4%～494.2% with the relative standard deviations of 9.4%～15.6% and 3.5%～4.9%, respectively.
出处
《分析科学学报》
CAS
CSCD
北大核心
2009年第2期153-156,共4页
Journal of Analytical Science
关键词
气相色谱-质谱
中空纤维膜液相微萃取
内标法
正己酸乙酯
白酒
Gas chromatography-mass spectrometry
Hollow Fiber Liquid Phase Microextraction （HF- LPME）
Ethyl caproate
Liquor
