Table 2.
Comparison of analytical characteristics of the preconcentrations methods for Co(II) and Hg(II).
| Method | Instrument | LOD, ng mL−1 | PF1 | Linear range, ng mL−1 | Ref. | |||
|---|---|---|---|---|---|---|---|---|
| Co(II) | Hg(II) | Co(II) | Hg(II) | Co(II) | Hg(II) | |||
| SPE on Amberlite XAD-2 resin anchored with pyrocatechol | FAAS | 0.95 | — | 24 | — | — | — | 28 |
| SPE ON 2-hydroxyacetophenone-functionalized polyurethane foam | FAAS | 0.8 | — | 36 | — | 2.7–150 | — | 29 |
| SPE on Duolite XAD 761 modified with a new Schiff base | FAAS | 2.2 | — | 26 | — | 15–340 | — | 30 |
| SPE on chelating resin | FAAS | 0.44 | — | 150 | — | 5–900 | — | 31 |
| Cationic micellar precipitation | ICP-OES | 0.009 | — | 40 | — | 0.03–700 | — | 32 |
| Magnetic SPE on magnetic core-shell nanoparticles modified with thiourea-derived chelating agents | Direct mercury analyzer | — | 0.017 | — | 100 | — | — | 33 |
| SPE on 2-nitroso-1-naphthol-4-sulfonic acid modified natural clinoptilolite zeolite | Derivative spectrophotometry | — | 0.1 | — | 95 | — | — | 34 |
| Cloud point extraction | ICP-OES | — | 1.1 | — | 51.3 | — | 10–100 | 35 |
| Magnetic SPE on Fe3O4@SiO2@PT nanocomposite | Cold vapor AAS | — | 0.02 | — | 267 | — | 0.8–70 | 36 |
| Preconcentration on an ion-imprinted polymer coated maghemite nanoparticles | FAAS | — | 4.1 | — | 100 | — | 20–1000 | 37 |
| SPE on Amberlite XAD-4 resin loaded with Anoxybacillus kestanboliensis | ICP-OES | 0.04 | 0.06 | 80 | 80 | 0.25–12.5 | 0.25–12.5 | This method |