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

Table 1

Different enrichment conditions.

No.	Resin mass/g	Flow rate, mL/min	pH
1	8	0.2	7
2	10	0.2	7
3	12	0.2	7
4	12	0.1	7
5	12	0.2	7
6	12	0.4	7
7	12	0.2	7
8	12	0.2	8
9	12	0.2	9