compound | linearity limit (ppm) | Molar absorptivity (L·mol−·cm− | Sandell’s Index g·cm2− | Sensitivity (ppm) | Detection limit (ppm) |
1 | 0.25 - 4.0 | 3.22 × 104 | 0.0041 | 0.0129 | 0.066 |
2 | 0.25 - 4.0 | 4.24 × 104 | 0.0035 | 0.0106 | 0.057 |
3 | 0.25 - 6.0 | 2.43 × 104 | 0.0048 | 0.0137 | 0.077 |
4 | 0.25 - 6.0 | 4.82 × 104 | 0.0030 | 0.0122 | 0.049 |
5 | 0.25 - 5.0 | 2.64 × 104 | 0.0097 | 0.0523 | 0.156 |
6 | 0.25 - 5.5 | 3.19 × 104 | 0.0088 | 0.0215 | 0.143 |