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| (In atomic percentige %)* Element | Carbon | Oxygen | Silicon | Copper | Hydrogen |
|---|---|---|---|---|---|
| Location 1 | 95.25 | 3.128 | 1.310 | 0.312 | 0.000 |
| Location 2 | 96.25 | 2.528 | 0.110 | 1.114 | 0.000 |
| Location 3 | 94.74 | 3.253 | 1.248 | 0.764 | 0.000 |
| Location 4 | 96.19 | 3.082 | 0.344 | 0.386 | 0.000 |
*Semi-quantitative analysis using EDS (energy dispersive spectrometry) method provided by SEM instrument (IXRF, 550i).
