Table 4 Potentiometric determination of DL in pharmaceutical preparation using SPCEs
From: Disposable screen-printed sensors for determination of duloxetine hydrochloride
Standard addition | -log conc. taken (mol L-1) | Pure solution | Cymbalta® tablets | Reported method23 | |||
|---|---|---|---|---|---|---|---|
Recovery % | RSD* % | Recovery % | RSD* % | Recovery % | RSD* % | ||
5.0 | 99.80 | 0.7 | 99.20 | 0.3 | |||
4.0 | 99.50 | 0.8 | 99.25 | 0.5 | 99.60 | 0.9 | |
3.0 | 100.00 | 0.6 | 99.33 | 0.4 | 99.75 | 0.7 | |
2.0 | 99.50 | 0.8 | 98.50 | 0.3 | 99.33 | 0.5 | |
Titration | 5.0 | 99.60 | 0.2 | 99.40 | 0.6 | 99.50 | 0.2 |
4.0 | 99.25 | 0.5 | 99.00 | 0.9 | |||
3.0 | 99.33 | 0.1 | 99.67 | 0.3 | |||
2.0 | 99.00 | 0.6 | 99.00 | 0.8 | |||