Standard addition method
Potentiometric titration
EDTA as titrant
Pure solutions
Official(1) method
Sensor 1
Sensor 2
Sensor 1
Sensor 1
Zn-TSC
Zn-ATSC
Zn-TSC
Zn-ATSC
Taken (mg)
R (%)
R.S.D%
R (%)
R.S.D%
Taken (mg)
R (%)
R.S.D%
R (%)
R.S.D%
1.79
98.0±0.50
99.4
0.35
98.64
0.35
5.38
99.37
0.21
99.2
0.11
2.69
99.25
0.47
99
0.47
8.97
99.78
0.27
99.45
0.26
3.59
99
0.48
98.5
0.48
12.56
99.69
0.3
99.36
0.33
X±S.E.
99.22±0.05
98.43±0.05
99.61±0.05
99.34±0.05
F value
2.35
2.25
1.73
1.59
t value
2.55
2.4
2.16
2.38
Octozinc (25 mg)
2.69
102.5±0.5
100.5
0.55
100.7
0.87
3.59
100.4
0.36
101.3
0.44
3.59
101.2
0.41
101.5
1.05
5.38
101.2
0.26
101.7
0.38
5.38
101.8
0.53
101.9
1.25
8.97
102.1
0.39
102.1
0.56
X±S.E.
101.20±0.05
101.42±0.52
101.33±0.05
101.7±0.05
F value
2.12
1.81
1.66
1.37
t value
1.75
1.55
2.14
1.86
Spiked Waste Water
2.69
98.0±0.50
98.5
0.36
98.3
0.42
-
-
-
-
-
3.59
98.3
0.27
98
0.38
-
-
-
-
-
X±S.E.
98.40±0.05
98.15±0.05
--
--
F value
1.36
1.68
--
--
t value
0.68
1.74
--
--
Table 4:
Determination of Zn-CMCPs applying the standard addition method, potentiometric titration in pure solution, Octozinc (25 mg), spiked waste water and its statistical data treatments in comparison with official methods.
