Table 1.
Selected physicochemical parameters of the solution of sodium trithiocarbonate (Na2CS3).
| Parameter | Unit | Result * |
|---|---|---|
| pH | - | 13.5 ± 0.1 |
| Appearance | - | Clear, dark red
|
| Density, at 23 °C | g/mL | 1.377 ± 0.017 |
| Concentration (Na2CS3) | % | 39.5 ± 0.1 |
| Concentration (SO32− + S2O32−) | % | 0.20 ± 0.05 |
| Substances insoluble in H2O | mg/L | <0.01 |
| Copper (Cu) | mg/L | <5 |
| Nickel (Ni) | mg/L | <10 |
| Zinc (Zn) | mg/L | <2 |
| Cadmium (Cd) | mg/L | <2 |
| Lead (Pb) | mg/L | <20 |
| Iron (Fe) | mg/L | 38.8 ± 0.2 |
| Total carbon ** | % | 6.73 ± 0.24 |
| Total hydrogen ** | % | 1.40 ± 0.54 |
| Total nitrogen ** | % | <0.01 |
| Total sulphur ** | % | 49.01 ± 0.75 |
* parameter value ± standard deviation, if applicable, ** for the solid (lyophilized) Na2CS3·H2O.