[Detection method and pattern recognition of ginseng and American ginseng pieces by electronic nose].
OBJECTIVE
To distinguish the ginseng and American ginseng pieces accurately and rapidly by electronic nose technology and principal component analysis (PCA) method.


METHODS
The optimum conditions of electronic nose for ginseng and American ginseng pieces, such as sample size and volume, headspace volume, incubation time and temperature were determined by the orthogonal test, the data were processed by the normalization method and the preprocessed data were analyzed PCA.


RESULTS
The detection methods of ginseng and American ginseng pieces was established by electronic nose, and the odor fingerprint figures of ginseng and American ginseng pieces were obtained, and ginseng and American ginseng pieces were distinguished by PCA recognition pattern.


CONCLUSIONS
A new accurate and rapid method to distinguish ginseng and American ginseng pieces was established by electronic nose detection.
School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China.
Cheng
C
Tian
Chunsheng
C
Liu
Haozhong
H
Wu
Yaojun
Y
Yang
Xi
X
Wang
Yuan
Y
Zhang
D001187:Artificial Organs; D004581:Electronics / Q000379:methods*; D009666:Nose; D005894:Panax / Q000145:classification*; D025341:Principal Component Analysis / Q000379:methods*