Determination of geosmin, 2-methylisoborneol, and a musty-earthy odor in wheat grain by SPME-GC-MS, profiling volatiles, and sensory analysis

被引：37
|
作者：
Jelen, HH [1 ]
Majcher, M [1 ]
Zawirska-Wojtasiak, R [1 ]
Wiewiórowska, M [1 ]
Wasowicz, E [1 ]
机构：
[1] August Cieszkowski Agr Univ Poznan, Inst Food Technol, PL-60624 Poznan, Poland
来源：
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2003年 / 51卷 / 24期
关键词：
electronic nose; musty-earthy off-odor;
D O I：
10.1021/jf030228g
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
Geosmin and 2-methylisoborneol-compounds responsible for the musty-earthy off-odor of wheat grain, were isolated by SPME and analyzed by GC-MS. Carboxen/PDMS/DVB fiber coating was selected because of its highest extraction efficiency. Concentrations of geosmin and 2-methylisoborneol as low as 0.001 mug/kg were detected in SIM mode using ion trap mass spectrometer. Apart from GC-MS determination of geosmin and 2-methylisoborneol, various methods for evaluating the musty-earthy off-odor caused by these compounds in wheat grain are presented. Sensory profile analysis differentiated wheat grain into sound and off-flavored, but the method was tedious. Similar groupings, however, were obtained using more rapid methods such as comparison of volatile profiles using SPME-fast GC with PCA projection of data and metal oxide (MOS) based electronic nose.
引用
收藏
页码：7079 / 7085
页数：7
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