Research Article
Exploiting of Green Synthesized Metal Oxide Nanoparticles in the Potentiometric Determination of Metformin Hydrochloride in Pharmaceutical Products
Table 3
Selectivity coefficient (
MTF
+) of conventional MTF-PT and MTF-PT-Al
2O
3-modified and MTF-PT-NiO-modified sensors using 1.0 × 10
−3 M of MTF solution.
| | Interferences | MTF-PT | MTF-PT-Al2O3 | MTF-PT-NiO |
| | Na+ | 1.3 × 10−3 | 1.4 × 10−4 | 9.3 × 10−3 | | Fe3+ | 2.5 × 10−3 | 1.6 × 10−3 | 5.1 × 10−3 | | Cr3+ | 5.0 × 10−3 | 5.1 × 10−3 | 1.9 × 10−3 | | Ag+ | 3.2 × 10−3 | 2.2 × 10−4 | 1.7 × 10−3 | | Ca2+ | 3.8 × 10−3 | 5.7 × 10−3 | 3.9 × 10−3 | | K+ | 7.9 × 10−3 | 1.9 × 10−4 | 1.6 × 10−4 | | Mg2+ | 1.1 × 10−3 | 4.5 × 10−4 | 3.2 × 10−4 | | Co2+ | 1.4 × 10−3 | 2.7 × 10−3 | 1.0 × 10−3 | | Serine | 1.3 × 10−3 | 5.5 × 10−3 | 5.0 × 10−4 | | Glycine | 2.1 × 10−3 | 1.3 × 10−4 | 1.6 × 10−3 | | Starch | 1.9 × 10−3 | 2.3 × 10−4 | 1.0 × 10−3 | | Guanidine | 1.1 × 10−3 | 9.2 × 10−4 | 8.2 × 10−4 | | Cycloguanil | 2.3 × 10−3 | 1.8 × 10−4 | 9.3 × 10−4 | | Synthalin | 5.6 × 10−3 | 5.9 × 10−4 | 6.5 × 10−4 | | Galegine | 4.2 × 10−3 | 3.6 × 10−4 | 7.4 × 10−4 |
|
|
