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	Ca^2+	Mg^2+	Na^+	K^+	Cd^2+	Fe^2+	Cu^2+	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.