Table 1. Procedure of silver recovery from dental amalgam residues using sucrose as reducing agent.
| Dilution | Precipitation | Reduction | ||||
|---|---|---|---|---|---|---|
| Samplemass (g) | 32.5% nitric acid volume at room temperature (mL)/ilution | 20% NaClvolume (mL) | Na OH concentration (%) | Na OH volume (mL) | Sucrose concentration (%) | Sucrose volume (mL) |
| 25.0 | 30.0/1 | 60.0 | 10.0 | 80.0 | 2.5 | 400.0 |
| 50.0 | 50.0/1 | 100.0 | 40.0 | 80.0 | 20.0 | 400.0 |
| 50.0 | 60.0/1 | 120.0 | 20.0 | 80.0 | 5.0 | 400.0 |
| 50.0 | 100.0/2 | 100.0 | 40.0 | 80.0 | 20.0 | 400.0 |
| 110.7 | 300.0/3 | 500.0 | 20.0 | 300.0 | 20.0 | 700.0 |
| 120.0 | 300.0/3 | 500.0 | 20.0 | 750.0 | 20.0 | 1600.0 |
| 134.4 | 300.0/3 | 550.0 | 20.0 | 400.0 | 20.0 | 440.0 |
| 150.0 | 300.0/3 | 500.0 | 20.0 | 750.0 | 20.0 | 2400.0 |
| 150.0 | 350.0/4 | 1200.0 | 20.0 | 800.0 | 20.0 | 1600.0 |
| 150.0 | 300.0/3 | 650.0 | 20.0 | 500.0 | 17.5 | 1100.0 |
| 150.0 | 300.0/3 | 800.0 | 20.0 | 400.0 | 20.0 | 2100.0 |