食品科学 ›› 2008, Vol. 29 ›› Issue (2): 287-291.

• 分析检测 • 上一篇    下一篇

顶空固相微萃取-气相色谱法检测啤酒中辛酸和癸酸

 刘春凤, 董建军, 王林祥, 李崎, 郑飞云, 李永仙, 顾国贤   

  1. 江南大学工业生物技术教育部重点实验室; 青岛啤酒股份有限公司科研中心; 江南大学分析测试中心; 江南大学工业生物技术教育部重点实验室 江苏无锡214122; 山东青岛266101; 江苏无锡214122;
  • 出版日期:2008-02-15 发布日期:2011-08-24

Determination of Caprylic Acid and Capric Acid in Beer by Head-space Solid Phase Microextraction

LIU  Chun-Feng, DONG  Jian-Jun, WANG  Lin-Xiang, LI  Qi, ZHENG  Fei-Yun, LI  Yong-Xian, GU  Guo-Xian   

  1. 1.Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China;2.Science and Research Center, Tsingtao Brewery Co. Ltd., Qingdao 266101, China;3.Analysis Center, Jiangnan University, Wuxi 214122, China
  • Online:2008-02-15 Published:2011-08-24

摘要: 利用SAS软件的Plackett-Burman试验设计法及响应面分析法,对顶空固相微萃取-气相色谱法检测啤酒中辛酸和癸酸的萃取条件进行优化,较佳的萃取工艺条件为:萃取温度51.32℃,萃取时间42.23min,加盐量0.51g/ml。方法的重复性较好、回收率较高,峰面积相对标准偏差(RSD)小于4%,辛酸和癸酸检测限分别为0.404μg/L和0.046μg/L,在0.404~8080mg/L和0.046~920mg/L浓度范围内线性关系良好,相关系数在0.999以上。

关键词: 顶空固相微萃取, 气相色谱, 啤酒, 脂肪酸, 响应面分析, Plackett-Burman设计法

Abstract: The Head-space solid phase microextraction conditions for analysis octanoic acid and capric acid in beer were optimized by SAS software combined with Plackett-Burman design and the response surface analysis. The optimal conditions were as follows:extract temperature 51.32 ℃, extract time 42.23 min and salt dosage 0.51 g/ml. This method had a better duplication and a higher recovery. The relative standard deviations (RSD) of peak areas for fatty acids were less than 4%, the detection limits of octanoic acid and capric acid was 4.04 μg/L and 0.046 μg/L, respectively, and the working curve linear scope was 0.404~ 8080 mg/L and 0.046~920 mg/L, respectively, with correlation coefficient more than 0.999.

Key words: head-space solid microextraction (HS-SPME), gas chromatography (GC), beer, fatty acids (FAs), response surface analysis (RSA), Plackett-Burman design