Table 1.

Physico-chemical properties of five phenols and the enrichment factor (EF) obtained with the MWCNTs/NaDC fiber

Compound	Structure	Molecular weight	CA (ng/mL)a	EFb
Phenol		94	9.12	91.2 ± 0.5
4-NP		139	8.96	89.6 ± 0.4
2-NP		139	8.53	85.3 ± 0.3
2,4-DMP		122	8.14	81.4 ± 0.2
2,4-DCP		163	9.01	90.1 ± 0.3

Samples of South China seawater (10 mL) were spiked with phenols at 10.0 ng/mL and extracted

^aC_A was calculated as the concentration of the analyte extracted

^bThe enrichment factor (EF) of the analytes was calculated as the ratio of the analyte concentration after extraction to that in the original sample