Table 2 The intra-day and inter-day precision and accuracy data for ETD obtained by the proposed methods (A – C).
From: Spectrophotometric determination of etodolac in pure form and pharmaceutical formulations
Intra-day | Inter-day | ||||||
|---|---|---|---|---|---|---|---|
Method | Added (μg mL-1) | Found ± SE a, b (μg mL-1) | Precision RSD % | Accuracy R.M.E % | Founda, b (μg mL-1) | Precision RSD % | Accuracy R.M.E % |
A | 1 | 0.99 ± 0.45 | 1.11 | -1.00 | 1.01 ± 0.20 | 1.49 | 1.00 |
3 | 3.02 ± 0.49 | 1.20 | 0.67 | 2.97 ± 0.37 | 0.91 | -1.00 | |
5 | 4.99 ± 0.26 | 0.64 | -0.20 | 4.94 ± 0.31 | 0.77 | -1.20 | |
7 | 6.97 ± 0.24 | 0.59 | -0.43 | 6.94 ± 0.34 | 0.85 | -0.86 | |
B | 2 | 2.02 ± 0.55 | 1.34 | 1.00 | 2.01 ± 0.63 | 1.54 | 0.50 |
4 | 3.97 ± 0.31 | 0.76 | -0.75 | 3.99 ± 0.46 | 1.13 | -0.25 | |
6 | 5.93 ± 0.29 | 0.71 | -1.17 | 5.96 ± 0.43 | 1.06 | -0.67 | |
8 | 8.05 ± 0.36 | 0.88 | 0.625 | 7.97 ± 0.38 | 0.93 | -0.38 | |
C | 4 | 3.98 ± 0.18 | 0.45 | -0.50 | 4.01 ± 0.46 | 1.12 | -0.50 |
8 | 7.95 ± 0.20 | 0.50 | -0.625 | 8.03 ± 0.40 | 0.98 | 0.38 | |
12 | 11.94 ± 0.33 | 0.82 | -0.50 | 12.04 ± 0.48 | 1.16 | 0.33 | |
16 | 16.02 ± 0.49 | 1.19 | 0.125 | 15.91 ± 0.54 | 1.32 | -0.56 | |