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

Table 4

LOD of Cu, Zn, Pb, and Cd.

Metals	LOD by APDC/DDTC, µg/L	LOD by modified PS beads, µg/L
Cu	0.2	0.2
Zn	4.0	3.1
Pb	0.08	0.03
Cd	0.02	0.01