Abstract:

The common volatile oil components in three different cultivars of ginger, Zhugen, Hongya and Laiwu, collected
from Chongqing, Hunan and Shandong, respectively were analyzed by GC-MS. The overlapping chromatographic peaks
were resolved by chemometric resolution method to obtain separate peaks and identification was performed by comparison
of the mass spectra obtained with those of authentic samples or with data already available in the NIST library. A total of 101
volatile components were detected in Zhugen ginger, 102 in Hongya ginger, and 100 in Laiwu ginger, together accounting
for 91.44%, 93.75% and 90.01% of the volatile oils, respectively. Forty volatile compounds were common to the three
cultivars, accounting for 39.60%, 39.22% and 40.00% of the total number of identified compounds, respectively; together
accounting for 76.56%, 76.44% and 69.86% of the volatile oils, respectively. Among these 40 compounds, the predominant
ones were zingiberene (7.05%, 27.53% and 18.09%)；α-citral (19.20%, 7.07% and 6.77%), β-phellandrene (11.65%, 2.52%
and 1.73%), cyclohexene, 3-(1,5-dimethyl-4-hexenyl)-6-methylene- (3.28%, 9.54% and 8.99%), a-curcumene (1.74%,
1.66% and 6.65%), camphene (6.94%, 0.95% and 5.35%), etc. From this study we conclude that the chemical components of
volatile oil in Zingiber officinale Rose differ greatly depending on the cultivar.

Key words: Zingiber officinale Rose, volatile oil, gas chromatography-mass spectrometry (GC-MS), chemometric resolution method