Table 3 Potentiometric determination of Cd(II) ion using the proposed modified electrode
Samples | [Hg(II)] (μg L−1) | ||||||
|---|---|---|---|---|---|---|---|
Taken | Cd(II)-CPE | ICP-OES | |||||
Found | Recovery (%) | RSD (%) | Found | Recovery (%) | RSD (%) | ||
River water | 5.0 | 4.945 | 98.9 | 0.948 | 5.01 | 100.2 | 1.125 |
7.5 | 7.395 | 98.6 | 0.211 | 7.448 | 99.3 | 1.005 | |
Industrial wastewater | 5.0 | 4.915 | 98.3 | 0.708 | 4.970 | 99.4 | 0.104 |
7.5 | 3.358 | 98.1 | 0.512 | 7.432 | 99.1 | 1.006 | |
Rechargeable battery waste | 5.0 | 4.895 | 97.9 | 0.197 | 4.985 | 99.7 | 1.125 |
7.5 | 7.313 | 97.5 | 0.221 | 7.418 | 98.9 | 1.256 | |
Plant foodstuff (carrot) | 5.0 | 4.910 | 98.2 | 0.194 | 4.995 | 99.9 | 1.258 |
7.5 | 7.313 | 97.5 | 0.198 | 7.665 | 102.2 | 1.369 | |
Fish tissue | 5.0 | 4.915 | 98.3 | 1.004 | 4.96 | 99.2 | 1.024 |
7.5 | 7.380 | 98.4 | 1.215 | 7.59 | 101.2 | 1.257 | |