Oxides
Sample T1(%)
Sample T11 (%)
SiO
2
59.6
93.5
CaO
15.2
1.8
SO
3
2.2
0.9
K
2
O
11.0
0.6
MgO
4.9
0.3
Al
2
O
3
0.2
0.5
P
2
O
5
2.5
0.3
Fe
2
O
3
0.2
0.1
ZnO
0.1
<0.1
TiO2
0
<0.1
CuO
<0.1
<0.1
SrO
0.1
0
MnO
0.1
0
BaO
0.1
0
ZnO
0.1
0
CuO
<0.1
0
Ash
2.19
1.76
T1: Powdered plant sample and burnt at 500°C; T11: Plant material with twice acid washed and calcined at 500°C and pH 7
Table 3:
Chemical Composition of
Equisetum arvenses
L. samples T1 and T11 obtained by X-ray Fluorescence after chemical treatment
