Table 2.
Analytical performance for HPLC determination of phenols using the MWCNTs/NaDC fiber
| Compound | Linear equation | R2 | LOD (ng/mL) | LOQ (ng/mL) | RSD (%, n = 6)a | RSD (%, n = 3)b |
|---|---|---|---|---|---|---|
| Phenol | y = 54409x + 1438.9 | 0.9997 | 0.16 | 0.64 | 4.9 | 7.6 |
| 4-NP | y = 32887x + 368.02 | 0.9997 | 0.28 | 1.12 | 5.1 | 11.9 |
| 2-NP | y = 52340x + 711.27 | 0.9998 | 0.15 | 0.60 | 6.3 | 8.8 |
| 2,4-DMP | y = 26372x + 775.15 | 0.9998 | 0.30 | 1.20 | 10.2 | 9.6 |
| 2,4-DCP | y = 21672x + 224.74 | 0.9998 | 0.29 | 1.16 | 7.1 | 5.7 |
aSingle fiber with six replicates
bFiber to fiber with three replicates. The Linear ranges were 1–100 ng/mL for five phonels