Magnetic solid phase extraction of copper from aquatic samples by Fe₃O₄/SiO₂ nanoparticles followed by atomic absorption spectrometric determination

ABSTRACT

A magnetic solid phase extraction was developed for preconcentration of Cu(II) as a 4-bromo-2-(2,4-dichloro-phenylimino)-phenol complex on Fe₃O₄/SiO₂ nanoparticles prior to its determination by atomic absorption spectroscopy. The effect of different parameters influencing the formation of the Cu complex and the extraction efficiency of the Cu complex were studied. Under optimal conditions, the calibration graph showed linearity in the range of 0.946–700 µg L⁻¹ (R² = 0.9995) of Cu(II). The limit of detection and relative standard deviation of the method (n = 6) were 0.283 µg L⁻¹ and 3.0%, respectively. The method was successfully applied to determine copper (II) in water samples.

KEYWORDS:

• Copper
• flame atomic absorption spectrometry
• silica coated magnetite
• magnetic nanoparticles
• preconcentration

Funding

The authors gratefully acknowledge the financial and technical support provided by the Payame Noor University.

Additional information

Funding

The authors gratefully acknowledge the financial and technical support provided by the Payame Noor University.