Direct Zinc Determination in Brazilian Sugar Cane Spirit by Solid-Phase Extraction Using Moringa oleifera Husks in a Flow System with Detection by FAAS
Table 2
Resulting matrix of the factorial design and analytical response*.
Run
Ca2+
Mg2+
Na+
K+
Cd2+
Fe2+
Cu2+
Integrated absorbance
1
0
0
0
0
0
0
0
0.2802
2
500
0
0
0
500
0
500
0.2471
3
0
500
0
0
500
500
0
0.0689
4
500
500
0
0
500
500
500
0.1440
5
0
0
500
0
0
500
500
0.1385
6
500
0
500
0
0
500
0
0.0709
7
0
500
500
0
500
0
500
0.0980
8
500
500
500
0
0
0
0
0.0821
9
0
0
0
500
500
500
500
0.0779
10
500
0
0
500
500
500
0
0.0120
11
0
500
0
500
0
0
500
0.0509
12
500
500
0
500
0
0
0
0.0137
13
0
0
500
500
0
0
0
0.0000
14
500
0
500
500
0
0
500
0.1234
15
0
500
500
500
500
500
0
0.0000
16
500
500
500
500
500
500
500
0.0286
17
250
250
250
250
250
250
250
0.0000
*Concentration of each interfering ion is given in μg L−1.