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Composition of the printed circuit boards from discarded personal computers [15].
| Material | Element | Concentration (Mass %) | Total (Mass %) |
|---|---|---|---|
| Organic Epoxy Resin | C | 18.10 | 31.8 |
| H | 1.80 | ||
| N | 0.32 | ||
| O (Org) | 6.03 | ||
| Br | 5.07 | ||
| Sb | 0.45 | ||
| Inorganic Glass Fiber | SiO2 | 24.70 | 37.6 |
| Al2O3 | 9.35 | ||
| CaO | 3.36 | ||
| MgO | 0.081 | ||
| BaO | 0.0022 | ||
| NaO | 0.09 | ||
| SrO | 0.035 | ||
| Metal Circuit Solder | Cu | 14.60 | 30.1 |
| Sn | 5.62 | ||
| Pb | 2.96 | ||
| Lead Frame | Fe | 4.79 | |
| Ni | 1.65 | ||
| Cr | 0.356 | ||
| Mo | 0.016 | ||
| Contacts | Ag | 0.045 | |
| Au | 0.0205 | ||
| Pd | 0.022 |
