Selective Separation and Preconcentration of Fe(III) and Zn(II) Ions by Solvent Extraction Using a New Triketone Reagent

Abstract

A simple, rapid, and accurate method was developed for separation and preconcentration of trace levels of iron(III) and zinc(II) ions in environmental samples. Methyl-2-(4-methoxy-benzoyl)-3-(4-methoxyphenyl)-3-oxopropanoylcarbamate (MMPC) has been proposed as a new complexing agent for Fe(III) and Zn(II) ions using solvent extraction prior to their determination by flame atomic absorption spectrometry (FAAS). Fe(III) and Zn(II) ions can be selectively separated from Fe(II), Pb(II), Co(II), Cu(II), Mn(II), Cr(III), Ni(II), Cd(II), Ag(I), Au(III), Pd(II), Cr(VI), and Al(III) ions in the solution by using the MMPC reagent. The analytical parameters such as pH, sample volume, shaking time, amount of MMPC reagent, volume of methyl isobutyl ketone (MIBK), effect of ionic strength, and type of back extractant were investigated. The recovery values for Fe(III) and Zn(II) ions were greater than 95% and the detection limits for Fe(III) and Zn(II) ions were 0.26 and 0.32 mg L À1 , respectively. The precision of the method as the relative standard deviation changed between 1.8 and 2.1%. Calibration curves have a determination coefficient (r 2 )of at least 0.997 or higher. The preconcentration factor was found to be 100. Accuracy of the method was checked by analyzing of a certified reference material and spiked samples. The developed method was applied to several matrices such as water, hair, and food samples.

Separation and Speciation of Iron Ions by Using Colorimetric Hydrogels

“…Many techniques are useful in determination of iron ions (5,6). The most significant of these techniques useful in determination of iron ions are UV-Vis spectrophotometry, graphite furnace atomic absorption spectrometry (GFAAS), inductive coupled plasma-atomic/optic emission spectrometry (ICP-AES/OES), cathodic stripping voltammetry techniques (CLE-ACSV), flow injection analysis (FIA), ion chromatography (IC) and X-ray fluorescence (XRF) (7)(8)(9)(10)(11). Iron at high concentrations may cause various health problems.…”

A coprecipitation procedure for the determination of some metals in food and environmental samples by flame atomic absorption spectroscopy

“…These metals can be toxic in excessive amounts, especially in certain genetic disorders. [7][8][9] In the environment, lead is known to be toxic to plants, animals and microorganisms. Plastics, shing tools, lead crystal glass used in cathode ray tubes, ceramics, solders, pieces of lead ashing and many other minor products are materials that contain lead.…”