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Total concentrations of paracetamol, ibuprofen and caffeine determined in spiked tap water by differential pulse voltammetry (DPV) on carbon nanofibers modified screen-printed electrodes (SPCNFE) by standard addition quantification method.
| Paracetamol | Ibuprofen | Caffeine | |
|---|---|---|---|
| Cdetermined (mg L−1) | 1.7 (0.2) | 19.8 (0.2) | 1.9 (0.2) |
| RSD (%) | 8.93 | 0.96 | 8.63 |
| Relative error (%) | 3.1 | 0.5 | 2.4 |
| Recovery (%) | 103.1 | 99.5 | 97.6 |
n = 3 for RSD (%).
