Table 1. Summary of results for metals in substrate holders analyzed by FP-XRF (mean ± standard deviation of three measurements, N.D.: not detected, N: number of measurements).
| Metal | aAl alloy holder, μg/cm2 | bPEEK holder, μg/cm2 | ||
|---|---|---|---|---|
|
| ||||
| w/o PC substrate (N = 3) |
w/ PC substrate (N = 9) |
w/o PC substrate (N = 3) |
w/ PC substrate (N = 9) |
|
| Fe | 24.8 ± 0.5 | 28.2 ± 6.9 | N.D. | N.D. |
| Cr | 4.6 ± 0.1 | 4.6 ± 0.2 | 3.2 ± 0.1 | 3.2 ± 0.1 |
| Mn | 6.2 ± 0.5 | 5.7 ± 0.9 | N.D. | N.D. |
| Cu | 57.1 ± 0.6 | 56.5 ± 1.2 | 1.6 ± 0.1 | 1.7 ± 0.1 |
| Zn | 14.6 ± 0.1 | 15.3 ± 1.3 | N.D. | N.D. |
| Ni | 73.5 ± 19.7 | 71.7 ± 14.2 | N.D. | N.D. |
| Ti | 1.3 ± 0.0 | 1.3 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 |
| Pb | 2.0 ± 0.1 | 3.1 ± 2.3 | N.D. | N.D. |
a
Al alloy holder supplied by the company,
b
custom made holder, PC: polycarbonate