Elemental Characterization of Romanian Crop Medicinal Plants by Neutron Activation Analysis
Table 1
IPE sample 205 Tobacco reference material [20] data (consensus values) and the NAA performance statistics .
Element (mg⋅kg−1)
Reference mean
Std. dev.
Measured mean
Uncertainty
As
0.415
0.069
0.48
0.16
0.37
Ba
23.0
3.16
32.94
9.34
1.01
Br
99.0
9.39
102.8
3.7
0.38
Cl
4600
326
4207
155
1.09
Co
0.302
0.0471
0.34
0.03
0.68
Cr
6.4
0.964
7.51
0.43
1.05
Cs
0.0608
0.01314
0.05
0.01
0.65
Cu
12.3
1.18
17.18
7.36
0.65
Fe
330
37.7
366.5
19.7
0.86
K
54900
3600
56150
2050
0.30
Mg
4710
326
4930
194
0.58
Mn
296
21.8
302.7
10.9
0.27
Na
260
55.9
301.0
16.8
0.70
388
180.3
566.5
19.8
0.98
Ca
30700
1970
32056
1249
0.58
Rb
26.5
2.92
28.28
1.71
0.53
Sb
0.222
0.0507
0.24
0.02
0.33
Sr
83.1
10.55
96.17
11.10
0.85
Zn
187
14.0
201.6
7.8
0.91
V
0.768
0.145
0.94
0.13
0.88
. dev.: standard deviation; measured mean: resulting from evaluation of the quantity of the element using several energy peaks from the gamma ray spectrum of the respective element (Kayzero for Windows, 2005) [21]; uncertainty: see Section 2.2; for the normalized error , see ISO 13528, 2015 [22]. value.
