Comparison the analytical performances of PG/GCE electrode with other reported electrodes for the determination of Cu2+, Cd2+, and Hg2+a.
| Modified electrode | Analytes | Linear range (μM) | LOD (μM) | Reference |
|---|---|---|---|---|
| EDTA-PANI/SWCNTs/SS | Cu2+ | 1.2–2000 | 0.08 | 9 |
| Hg2+ | 2–2000 | 0.68 | ||
| NH2-MIL-88(Fe)-rGO/GCE | Cu2+ | 0.005–0.05 | 0.0036 | 7c |
| Cd2+ | 0.005–0.3 | 0.0049 | ||
| RGO/Bi/CPE | Cu2+ | 0.3125–1.5625 | 0.406 | 8 |
| Cd2+ | 0.1785–1.0714 | 0.025 | ||
| Alk-Ti3C2/GCE | Cu2+ | 0.1–1.5 | 0.032 | 20 |
| Cd2+ | 0.1–1.5 | 0.098 | ||
| Hg2+ | 0.1–1.5 | 0.130 | ||
| Pd/PAC/GCE | Cu2+ | 0.5–5.0 | 0.066 | 22 |
| Cd2+ | 0.5–5.5 | 0.041 | ||
| Hg2+ | 0.24–7.5, | 0.054 | ||
| NG/GCE | Cu2+ | 0.01–5 | 0.005 | 7d |
| Cd2+ | 0.05–1000 | 0.05 | ||
| Hg2+ | 0.2–9 | 0.05 | ||
| PG/GCE | Cu2+ | 0.25–5.5 | 0.024 | This work |
| Cd2+ | 0.25–5.5 | 0.015 | ||
| Hg2+ | 0.25–5.5 | 0.032 |
a
EDTA: ethylenediaminetetraacetic acid. SS: stainless steel. Alk-Ti3C2: alkaline-Ti3C2. PAC: porous activated carbons. NG: N-doped graphene.