Research Article
Exploiting of Green Synthesized Metal Oxide Nanoparticles in the Potentiometric Determination of Metformin Hydrochloride in Pharmaceutical Products
Table 2
Electrochemical response characteristics of MTF-PT conventional and MTF-PT-Al2O3-modified and MET-PT-NiO-modified sensors.
| | Parameter | MTF-PT conventional sensor | MTF-PT-Al2O3-modified sensor | MTF-PT-NiO-modified sensor |
| | Slope (mV decade−1) | 52.1 ± 0.5 | 57.01 ± 0.4 | 58.27 ± 0.7 | | Intercept (a) | 729 | 890.66 | 843.27 | | Correlation coefficient (r) | 0.9992 | 0.9998 | 0.9999 | | Linear range (M) | 1.0×10−6‐1.0 × 10−2 | 1.0 × 10−10‐1.0 × 10−2 | 1.0 × 10−10‐1.0 × 10−2 | | LOD (M) | 5.0 × 10−7 | 5.0 × 10−11 | 5.0 × 10−11 | | Response time, (s) | 45 | 20 | 30 | | Working pH range | 4‐9 | 4‐9 | 4‐9 | | Lifetime (day) | 27 | 45 | 35 | | Temperature (°C) | 25 | 25 | 25 | | Accuracy (%) | 98.98 ± 0.57 | 99.69 ± 0.38 | 99.55 ± 0.53 |
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