Table 6.
Concentration of PA’s monomers and relative polymers in sediment sample.
| Acronym | AHA 1 (μg/L) |
Nylon 6 2 (ppm) |
HMDA 1 (μg/L) |
Nylon 6,6 2 (ppm) |
TPA 1 (mg/L) 1 |
PET (ppm) 2 |
|---|---|---|---|---|---|---|
| MEL1 | n.d. 3 | n.a. 3 | n.d. | n.a. | 0.101 | 290 |
| MEL2 | n.d. | n.a. | n.d. | n.a. | 0.0489 | 137 |
| CAL1 | 36.6 | 11.2 | 8.97 | 2.7 | 0.633 | 1523 |
| CAL2 | 35.0 | 12.1 | n.d. | n.a. | 0.061 | 174 |
1 Concentration of the monomer (or its dansyl derivative in the case of the two amines) in the solution obtained after purification of the corresponding acid (for the two amines) or alkaline (for TPA) hydrolysate. 2 Total concentration in ppm (mg polymer/kg dry sediment) as calculated from the detected amount of the corresponding monomers. 3 n.d.= not detectable (below the limit of detection, LOD); n.a. = not applicable.