| Pure solutions |
Official(1) method |
Sensor 1 |
Sensor 2 |
Sensor 3 |
| Taken (mg) |
|
Recovery (%) |
R.S.D.% |
Recovery (%) |
R.S.D.% |
Recovery (%) |
R.S.D.% |
| STA as titrant |
| 14.20 |
|
99.23 |
0.88 |
98.77 |
0.49 |
99.66 |
0.37 |
| 23.68 |
|
99.75 |
0.79 |
98.95 |
0.58 |
99.25 |
0.68 |
| 33.15 |
|
99.45 |
0.84 |
98.56 |
0.18 |
99.73 |
0.84 |
| 47.36 |
|
99.83 |
1.25 |
99.10 |
0.52 |
99.84 |
1.52 |
| X ± S.E. |
98.50 ± 0.50 |
99.57 ± 0.35 |
98.85 ± 1.11 |
99.62 ± 0.58 |
| F value |
|
2.59 |
2.33 |
2.08 |
| t value |
2.35 |
2.12 |
2.65 |
| SMA as titrant |
|
|
|
|
| 14.20 |
|
98.44 |
1.35 |
98.05 |
1.22 |
98.60 |
1.56 |
| 23.68 |
|
98.38 |
1.68 |
98.36 |
1.73 |
98.94 |
1.24 |
| 33.15 |
|
98.47 |
1.62 |
98.05 |
1.65 |
98.66 |
1.33 |
| 47.36 |
|
98.92 |
1.45 |
98.00 |
1.85 |
98.25 |
1.40 |
| X ± S.E. |
98.50 ± 0.50 |
98.55 ± 0.52 |
98.10 ± 0.23 |
98.61 ± 0.14 |
| F value |
|
2.33 |
2.14 |
1.58 |
| t value |
|
2.27 |
2.56 |
1.93 |
| Praxilene (200 mg) STA as titrant |
| 14.20 |
|
100.75 |
0.31 |
101.15 |
0.23 |
100.15 |
0.41 |
| 23.68 |
|
100.25 |
0.06 |
101.31 |
0.47 |
100.43 |
0.32 |
| 33.15 |
|
100.63 |
0.22 |
101.25 |
0.55 |
100.63 |
0.04 |
| X ± S.E. |
101.70 ± 0.50 |
100.54 ± 0.22 |
101.24 ± 0.68 |
100.40 ± 0.13 |
| F value |
|
2.91 |
2.73 |
2.11 |
| t value |
|
2.75 |
2.84 |
2.36 |
| Praxilene (200 mg) SMA as titrant |
| 14.20 |
|
101.44 |
0.81 |
101.65 |
0.39 |
101.13 |
0.48 |
| 23.68 |
|
101.68 |
0.43 |
101.88 |
0.63 |
101.40 |
0.35 |
| 33.15 |
|
101.45 |
0.11 |
101.94 |
0.45 |
101.67 |
1.04 |
| X ± S.E. |
101.70 ± 0.50 |
101.52 ± 0.15 |
101.82 ± 85 |
101.40 ± 37 |
| F value |
|
1.64 |
2.21 |
1.53 |
| t value |
|
1.84 |
2.05 |
1.71 |
X ± S.E: Recovery ± standard error F-tabulated is 6.39 at 95.0% confidence limit, t-tabulated at 99.0% confidence limit and 6 degrees of freedom |
