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

Figure 7

The effect of (a) mass of resin, (b) the flow rate of the sample, and (c) pH of the sample on the test results of trace metals. (d) Repeatability of the enrichment preconcentration column when applying the condition of 12 g resin, 0.2 mL/min of the flow rate, and pH 7.

(a)

(b)

(c)

(d)