Analytical approaches for the determination of cobalt, nickel and copper by aeration-assisted homogeneous liquid–liquid microextraction and flame atomic absorption spectrometry

Abstract

A new aeration-assisted homogeneous liquid-liquid microextraction using high-density solvent for determination of copper, nickel and cobalt, as a prior step to their determination, coupled to flame atomic absorption spectrometry is presented. Under the optimum conditions, the calibration graphs were linear in the range of 5.0-600.0 ng/mL for copper, 10.0-450.0 ng/mL for nickel and 8.0-500.0 ng/mL for cobalt. The limits of detection were 1.3, 3.6 and 2.7 ng/mL and the enrichment factor estimated to be 350, 340 and 360, for copper, nickel and cobalt, respectively. The proposed method was successfully applied for the determination of these cations in different samples. ARTICLE HISTORY

Ultrasound-assisted ionic liquid-based dispersive liquid-liquid microextraction procedure for preconcentration of cobalt and nickel in environmental and biological samples prior to FAAS determination

“…Enrichment and separation techniques are required to analyze Co(II) and Ni(II) at trace levels due to low metal concentrations and matrix interferences in actual samples. Several enrichment procedures have been developed for the determination of Co(II) and Ni(II), involving various analytical techniques such as coprecipitation [13][14][15][16][17][18][19], liquid-liquid microextraction [20][21][22][23][24][25], cloud point extraction [26][27][28][29][30][31], membrane filtration [32,33], and solid-phase extraction [34][35][36][37][38][39][40][41].…”

Functionalized superparamagnetic nanoparticles with a polymer containing β‐cyclodextrin for the extraction of sertraline hydrochloride in biological samples

“…In some other reports, based on its reversible reduction at 0.591 V, cyclic voltammetry, electrochemical impedance spectrometry, and differential pulse voltammetry were also applied to study the electrochemical behavior of sertraline hydrochloride. Generally, LPME and SPE were developed as methods for sample preparation for drugs and other samples .…”