Table 3.
Detection of difenidol hydrochloride in real samples and their recoveries.
| Sample (×10−6 mol·L−1) |
Added (×10−6 mol·L−1) |
Actual (×10−6 mol·L−1) |
Founded (×10−6 mol·L−1) |
Recovery (%) |
R.S.D. (%, n = 3) |
|---|---|---|---|---|---|
| 0 | - | - | - | - | - |
| 1.5 | 1.5 | 0.75 | 0.74 ± 0.03 | 99.10 | 3.91 |
| 3 | 1.125 | 1.15 ± 0.02 | 102.28 | 1.77 | |
| 6 | 1.875 | 1.86 ± 0.02 | 99.51 | 1.02 | |
| 15 | 4.125 | 4.12 ± 0.20 | 101.10 | 4.41 | |
| 30 | 7.875 | 7.83 ± 0.20 | 98.99 | 1.97 |
R.S.D.: relative standard deviation.