Research Article
An Eco-Friendly, Interference, and Solvent Free Surfactant-Assisted Dual-Wavelength β-CorrectionSpectrometric Method for Total Determination and Speciation of Cu2+ Ions in Water
Figure 4
Influence of standing time (0.0–70 min) and various volumes (0.0–1000 μL) of NaCl concentration (1.0 × 103 μg mL−1) on the absorbance of Cu-ZI complex. Conditions: [Cu2+] = 47.62 μM, [ZI] = 1.0 × 10−4 M and solution pH 3 at 625 nm.