Separation and Preconcentration of Trace Amounts of Manganese and Nickel from Natural Water Samples by a Diimine Derivative Schiff Base-Coated Silica-Gel Minicolumn
Table 4
Determination of Ni (II) and Mn (II) in natural water samples (, Sample volume: 1000 mL, eluent volume: 5 mL).
Sample
Added (g L−1)
Found (g L−1)
Relative Recover (%)
Mn
Ni
Mn
Ni
Mn
Ni
River
0.0
0.0
8.70 ± 0.20
—
—
10.0
10.0
24.30 ± 0.60
19.10 ± 0.50
102.0
104.0
20.0
20.0
33.80 ± 0.80
28.90 ± 0.70
98.5
101.0
River
0.0
0.0
13.20 ± 0.30
6.50 ± 0.18
—
—
10.0
10.0
23.00 ± 0.50
16.30 ± 0.40
98.0
98.0
20.0
20.0
33.50 ± 0.90
26.20 ± 0.60
101.5
98.5
Tap
0.0
0.0
5.80 ± 0.16
2.30 ± 0.06
—
—
10.0
10.0
15.60 ± 0.40
12.40 ± 0.30
98.0
101.0
20.0
20.0
25.70 ± 0.60
22.50 ± 0.60
99.5
101.0
Mineral
0.0
0.0
3.20 ± 0.08
1.10 ± 0.03
—
—
10.0
10.0
12.90 ± 0.30
10.70 ± 0.30
97.0
96.0
20.0
20.0
22.50 ± 0.50
20.60 ± 0.40
96.5
97.5
Sea
0.0
0.0
9.60 ± 0.20
4.80 ± 0.14
—
—
10.0
10.0
19.10 ± 0.40
14.50 ± 0.30
95.0
97.0
20.0
20.0
28.70 ± 0.70
24.10 ± 0.60
95.5
96.5
aSefidrood river, Iran.
bKaraj river, Iran.
cDrinking water system of Tehran, Iran.
dDamavand mineral water, Iran.
eCaspian sea water, Anzali, Iran.
fmean ± standard deviation.
