Research Article
Exploiting of Green Synthesized Metal Oxide Nanoparticles in the Potentiometric Determination of Metformin Hydrochloride in Pharmaceutical Products
Table 4
The results of the MTF determination in bulk powder using MTF-PT, MTF-PT-Al2O3NP-modified, and MTF-PT-NiONP-modified sensors.
| | MTF-PT conventional sensor | MTF-PT-Al2O3NP-modified sensor | MTF-PT-NiONP-modified sensor | Test solution | Found | % recovery | Test solution | Found | %Recovery | Test solution | Found | % recovery |
| Statistical analysis | 6 | 5.99 | 99.83 | 10 | 9.96 | 99.60 | 10 | 9.95 | 99.50 | 5 | 4.96 | 99.20 | 8 | 7.99 | 99.87 | 8 | 7.96 | 99.50 | 4.3 | 4.20 | 97.76 | 6 | 5.98 | 99.66 | 6 | 5.94 | 99.00 | 4 | 3.97 | 99.25 | 4 | 4.00 | 100.00 | 4 | 3.99 | 99.75 | 3 | 2.96 | 98.67 | 3 | 2.97 | 99.00 | 3 | 2.97 | 99.00 | 2 | 1.97 | 98.50 | 2 | 1.99 | 99.50 | 2 | 2.00 | 100.00 |
| Mean ± SD | 98.87 ± 0.72 | 99.60 ± 0.34 | 99.45 ± 0.40 |
| n | 6 | 6 | 6 |
| Variance | 0.52 | 0.12 | 0.16 |
| % SE | 0.29 | 0.14 | 0.16 |
| % RSD | 0.73 | 0.34 | 0.40 |
|
|
Test and found solutions −log conc. (mol L −1) SE (% Error) = %RSD/√n. |