Chemistry Combining Elemental Profile, Stable Isotopic Ratios, and Chemometrics for Fine Classification of a Chinese Herb Licorice (Glycyrrhiza uralensis Fisch.) from 37 Producing Area

Table 2

Summary of elemental analysis and stable isotopic ratios for GUF samples from 37 different geographical origins.

Items^a	Lowest of average^b	Highest of average	Sd of average
Se	–^c	–	–
Cd	–	–	–
Fe	45	809	211
Na	319	4615	1123
Sr	0.912	8.228	1.9
Co	0.587	4.729	1.1
K	3050	11330	2091
Al	33	415	116
Cr	0.315	20.8	5.5
Mg	1639	4578	819
Pb	0.039	0.408	0.09
Zn	2.965	22.80	5.1
Ca	857	6623	1270
Cu	3.25	10.77	2.1
Mn	8.56	30.75	6.7
δ13C	–34.1	–27.1	1.8
δ15N	–4.97	–2.15	0.8
δ18O	10.1	15.3	1.4

‘a’ represents the units of elemental levels and stable isotopic ratios, which are μg/g dry weight and %, respectively. ‘b’ represents the average of the 30 objects from each geographical origin. ‘c’ represents nondetected.