Table 4.

Contents of three curcuminoids and three volatile compounds in commercial samples (mg/g).

Sample	Collecting Region	BMC	DMC	C	ar-Turmerone	β-Turmerone	α-Turmerone
1	Songzhou, Sichuan	3.49 ± 0.06	4.98 ± 0.12	16.48 ± 0.45	12.43 ± 0.44	5.47 ± 0.21	8.19 ± 0.33
2	Songzhou-2, Sichuan	3.69 ± 0.08	3.51 ± 0.10	11.67 ± 0.23	5.33 ± 0.04	4.00 ± 0.03	9.48 ± 0.18
3	Sichuan-1	3.11 ± 0.05	4.14 ± 0.09	12.23 ± 0.54	10.51 ± 0.35	7.64 ± 0.11	18.57 ± 0.02
4	Wenshan, Yunnan	4.31 ± 0.15	4.99 ± 0.10	16.06 ± 0.17	10.38 ± 0.39	6.71 ± 0.14	15.88 ± 0.44
5	Sichuan-2	3.68 ± 0.07	4.90 ± 0.11	15.35 ± 0.51	8.01 ± 0.03	5.62 ± 0.01	12.67 ± 0.05
6	Sichuan-3	3.15 ± 0.04	2.64 ± 0.05	10.16 ± 0.13	4.74 ± 0.09	5.52 ± 0.02	16.91 ± 0.28
7	Guangzhou, Guangdong	3.79 ± 0.02	5.82 ± 0.05	10.94 ± 0.09	11.68 ± 0.18	3.50 ± 0.03	3.54 ± 0.04
8	Shaoguan, Guangdong	2.76 ± 0.06	3.35 ± 0.06	12.02 ± 0.05	11.36 ± 0.03	3.72 ± 0.02	4.04 ± 0.03
9	Zhanjiang, Guangdong	2.86 ± 0.02	3.64 ± 0.05	11.47 ± 0.38	12.93 ± 0.22	8.92 ± 0.14	21.54 ± 0.85
10	Hanzhong, Shanxi	3.63 ± 0.05	4.37 ± 0.05	14.32 ± 0.11	8.77 ± 0.05	9.77 ± 0.08	30.27 ± 0.12
11	Anguo, Hebei	5.83 ± 0.04	7.60 ± 0.09	14.91 ± 0.05	11.88 ± 0.05	8.50 ± 0.45	19.55 ± 0.34
12	Yulin, Guangxi	3.22 ± 0.03	4.50 ± 0.01	14.60 ± 0.07	11.04 ± 0.02	10.27 ± 0.10	29.16 ± 0.24

The data is presented as an average of duplicates from two individual extracts for each sample.