Table 5. Surface concentrations, given in atomic% and binding energies (B.E.) of peaks given in eV, as related to XPS signal contributions obtained by fitting C1s and O1s XPS spectra obtained for dry fishing lines, and for urea and uric acid powders.
| Peak (B.E./eV) | C1s (285.0) | C1s (286.0) | C1s (286.9) | C1s (288.0) | C1s (289.0) | C1s (291.0) | O1s (531.4) | O1s (532.7) | N1s (400) |
|---|---|---|---|---|---|---|---|---|---|
| Droplet sample | 19.3 | 5.5 | 7.3 | 5.4 | 7.9 | - | 20.1 | 7.3 | 19.3 |
| Urea | 11.2 | 1.5 | 0.6 | - | 23.6 | - | 20.5 | - | 42.7 |
| Uric acid | 13.5 | 6.3 | 6.8 | 8.6 | 15.5 | shake-up | 21.1 | - | 27.5 |