Research Article
New Simple Spectrophotometric Method for the Simultaneous Estimation of Paracetamol and Flupirtine Maleate in Pure and Pharmaceutical Dosage Form
Table 4
Precision results for PAR and FLU.
| Parameters | Sampling time | PAR | FLU | Amount present (mg) | Amount present (%) | RSD (%) | Amount present (mg) | Amount present (%) | RSD (%) |
| Repeatability () | 0 hrs | 326.61 | | 0.46 | 100.61 | | 0.97 | 8th hrs | 327.85 | | 0.48 | 100.08 | | 1.20 | 16th hrs | 326.90 | | 0.25 | 98.76 | | 0.36 |
| Intermediate precision () |
1st day | 328.30 | | 0.51 | 101.40 | | 0.74 | 2nd day | 325.12 | | 0.12 | 100.88 | | 0.58 | 3rd day | 325.61 | | 0.10 | 98.62 | | 0.30 | Analyst-1 | 326.33 | | 0.33 | 101.14 | | 0.46 | Analyst-2 | 325.50 | | 0.03 | 100.88 | | 0.58 | Instrument-1 | 326.12 | | 0.17 | 100.51 | | 0.97 | Instrument-2 | 325.95 | | 0.22 | 100.12 | | 1.0037 |
| Reproducibility () | Lab-1 | 325.51 | | 0.12 | 99.23 | | 0.36 | Lab-2 | 325.17 | | 0.20 | 100.24 | | 0.37 |
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The low % RSD (<2%) for PAR and FLU indicated that the method is precise.
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