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Concentrations of perfluorinated compounds in the carpet at different age.
| Compound | Concentration (ng/g), RSD (%) | |||||
|---|---|---|---|---|---|---|
| New | 3 years | 20 years | ||||
| 8:2 FTOH | 21,416 | 6.0 | 9638 | 3.0 | ND | |
| 10:2 FTOH | 11,792 | 3.0 | 3820 | 6.0 | ND | |
| PFOA | 37,458 | 1.3 | 10,339 | 7.5 | 9486 | 6.3 |
ND: not detectable.
