Table 4 Analytical results for the determination of phenols in seawater samples from the South China Sea and Wastewater
Samples | Phenol | 4-NP | 2-NP | 2,4-DMP | 2,4-DCP |
|---|---|---|---|---|---|
Yangpu | |||||
 Concentration (ng/mL) | ndc | nd | nd | nd | nd |
 Recoverya | 93.1 | 85.6 | 92.6 | 89.3 | 91.2 |
RSD (%, n = 3) | 4.2 | 5.0 | 6.8 | 5.1 | 4.9 |
 Baishamen | |||||
 Concentration (ng/mL) | nd | nd | nd | nd | nd |
 Recoveryb | 95.1 | 89.6 | 94.2 | 88.6 | 95.4 |
RSD (%, n = 3) | 6.4 | 5.9 | 6.8 | 7.1 | 8.2 |
Holiday beach | |||||
 Concentration (ng/mL) | nd | nd | nd | nd | nd |
 Recoveryb | 81.6 | 85.4 | 87.3 | 81.9 | 80.3 |
 RSD (%, n = 3) | 5.9 | 6.8 | 7.1 | 6.9 | 8.3 |
Wastewater | |||||
 Concentration (ng/mL) | 3.64 ± 0.17 | nd | nd | nd | nd |
 Recoveryb | 85.3 | 84.1 | 85.6 | 90.5 | 82.6 |
 RSD (%, n = 3) | 5.9 | 6.8 | 7.1 | 6.9 | 8.3 |