Research Article

Ultratrace Determination of Cr(VI) and Pb(II) by Microsample Injection System Flame Atomic Spectroscopy in Drinking Water and Treated and Untreated Industrial Effluents

Figure 2

Influence of sample pH on DLLME at 40 mL initial volume of water samples 0.25% APDC, 100 μL CCl4, 1.00 mL of ethanol, and 0.01 mg/L Cr(VI)/Pb(II).
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