Micell-Mediated Extraction for Preconcentration and Determination of Copper and Zinc in Real Samples
Keywords:
N,N’-diacetyl-4-bromo-2,6-di(aminomethyl)phenol(DBDP), Cloud Point Extraction, Copper and Zinc Ions, Triton X-114, Flame Atomic Absorption Spectrometry.Abstract
Cloud point extraction has been used for the pre-concentration of copper and zinc, after
the formation of a complex with N,N’-diacetyl-4-bromo-2,6-di(aminomethyl) phenol(DBDP), and
later analysis by flame atomic absorption spectrometry using Triton X-114 as surfactant. The
adopted concentrations for DBDP, Triton X-114 and HNO3, bath temperature, centrifuge rate
and time were optimized. Detection limits (3Sb/m) of 1.6 and 1.9 ng mL-1
for Cu2+ and Zn2+ along
with enrichment factors of 33 for these ions were achieved. The high efficiency of cloud point
extraction to carry out the determination of these ions in complex matrices was demonstrated.
The proposed procedure was applied to the analysis of natural and waste water, soil and blood
samples. The determination of these metal ions content in various real samples showed
quantitative recoveries for the spiked samples. The proposed method is characterized by
simplicity, efficiency and low cost.