Journal of Analytical Methods in Chemistry / 2019 / Article / Tab 2

Research Article

Chemometric Analysis of Elemental Fingerprints for GE Authentication of Multiple Geographical Origins

Table 2

Average contents, standard deviations (SD), detection limits, and relative standard deviations (RSD) of the 15 mineral elements in GE samples.

ElementsAverage levels (SD) (μg/g)Detection limit (μg/g)aAverage RSD (%) ()b

Mo0.51 (0.19)0.051.9
Zn15.13 (3.18)0.010.8
Pb0.18 (0.05)0.011.3
Cd0.08 (0.03)0.012.3
Ni1.13 (0.36)0.013.6
Co0.16 (0.05)0.012.1
Fe52.16 (19.22)0.60.9
Mn11.68 (4.02)0.011.1
Cr0.58 (0.22)0.042.6
Mg183 (59)0.011.0
Cu1.51(0.36)0.031.9
Ca411 (119)0.70.7
Sr11.16 (3.18)0.012.6
Na116 (38)0.11.1
K4668 (1066)2.00.8

aThe levels corresponding to a signal intensity of 3σ in the standard curve, where σ was computed from 11 repeated measurements of the blank. bAverage RSD across samples of different geographical origins.

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