A Chelating Resin of EDTA-Type Modified Cross-Linking Polystyrene to Preconcentrate Trace Metals for Seawater Detection

Table 2

Detection of commercial standard seawater.

	Standard seawater, µg/L	Enriched by APDC/DDTC, µg/L	Enriched by modified PS beads, µg/L
Cu	5.0 ± 0.4	5.103	4.949
Zn	70 ± 3	71.211	69.248
Pb	10.0 ± 0.6	9.974	9.951
Cd	1.00 ± 0.06	0.971	0.987