Membrane Filtration of Iron(III), Copper(II) and Lead(II) Ions as 1‐(2‐Pyridylazo) 2‐Naphtol (PAN) for Their Preconcentration and Atomic Absorption Determinations

Abstract

A membrane filtration procedure for the preconcentration and atomic absorption spectrometric determination of Pb(II), Co(II) and Fe(III) ions in natural water samples has been established. Cellulose nitrate membrane filters (0.45 μm and 47 mm diameter) were used in all experiments. The procedure is based on chelate formation of the analyte metals with 1‐(2‐pyridylazo) 2‐naphtol (PAN) and on retention of the chelates on cellulose nitrate membrane filter. The cellulose nitrate membrane and analyte ions were completely dissolved by 500 μL of nitric acid at 85 °C on a hood and then metal determinations were performed by flame atomic absorption spectrometry. The method was applied to natural water samples for the determination of analyte ions with satisfactory results, e.g., recoveries > 95%, RSD's < 10%.

Solid Phase Extraction of Lead(II) by Sorption on Grinded Eucalyptus Stem and Determination with Flame Atomic Absorption Spectrometry

“…6 Thus, there is a great interest concerning the implementation of a reliable preconcentration system for lead(II) for analytical determinations. 7 Several methods extensively used for preconcentration include liquid-liquid extraction, [8][9][10][11] co-precipitation, 12-14 ion exchange, solid-phase extraction [15][16][17][18][19][20] and chelating matrices. To solve the problem of main problem of FAAS and ICP-AES techniques for trace analysis, solid-phase extraction is the one of the important preconcentration method.…”

Octa-&lt;i&gt;O&lt;/i&gt;-Methoxy Resorcin [4] Arene Amberlite XAD-4 Polymeric Chelating Resin for Solid Phase Extraction, Preconcentration, Separation and Trace Determination of Ni(II), Cu(II), Zn(II) and Cd(II) Ions

“…Different separation and preconcentration techniques using solid phase extraction (SPE) [28], co-precipitation [29] solvent extraction [30], membrane filtration [31], cloud point extraction [32,33], flotation [34], electrochemical decomposition [35] ion exchange etc. have been developed for the trace metal ion determination.…”

“…Literature reveals only few reports on the extraction of metal ions using calyx [4] resorcinarene and its derivatives [74][75][76][77][78][79][80]. As far as work on polymer supported calyx [4] resorcinarenes is concerned, Merdivan et al [31,81,82] have reported the use of calyx [4] resorcinarene impregnated on Amberlite XAD for separation and preconcentration of rare earths.…”

Membrane filtration – atomic absorption spectrometry combination for copper, cobalt, cadmium, lead and chromium in environmental samples

“…Among the different techniques used for the separation and preconcentration, membrane filtration is preferred due to the low risk of contamination, the use of environmentally safe reagents, and simple methodology (Itoh et al, 1983, Gao et al, 1996, Soylak et al, 2004, Pourreza and Ghanemi 2006. If the metal ions were allowed to be directly collected in the form of metal complexes or ion-pairs on a membrane filter from an aqueous solution by filtration, this membrane filtration can be used as a rapid and simple separation and concentration technique for pretreatment of analytical samples.…”