Weight%

Element

Point 1

Point 2

Point 3

Point 4

Point 5

Before Exposure

Carbon

97.82%

97.36%

97.16%

97.80%

98.31%

Oxygen

2.18%

2.64%

2.84%

2.20%

1.69%

After Exposure

Carbon

94.50%

93.63%

96.82%

96.14%

95.21%

Oxygen

5.50%

6.37%

3.18%

3.86%

4.79%