Table 2.
Sample | Linear fit gradient, Se, Pb, mass | Intersection | Molar ratio |
---|---|---|---|
Ct4-c | - | - | - |
Ct7-c | 3.7 × 10−4 | 1.03 × 10−16 | - |
Pb5-c | 0.35 | −3.70 × 10−17 | 0.92 |
Pb5-h | 0.31 | 1.33 × 10−18 | 0.82 |
Pb7-c | 0.33 | −1.36 × 10−17 | 0.88 |
Pb7-h | 0.28 | −7.28 × 10−18 | 0.73 |