| Sample identification n = 6 | Wavelength (nm) | Absorbance | Concentration (ppm) |
| TIS1 | 352 | 0.41620 | 22 |
| TIS2 | 352 | 0.41620 | 22 |
| TIS3 | 352 | 0.41620 | 22 |
| TIS4 | 352 | 0.41620 | 22 |
| TIS5 | 352 | 0.41620 | 22 |
| TIS6 | 352 | 0.41620 | 22 |