Solid phase extraction of iron and lead in environmental matrices on amberlite xad-1180/pv

Abstract

Recebido em 10/12/04; aceito em 12/8/05; publicado na web em 20/1/06 A solid phase extraction procedure using Amberlite XAD-1180/Pyrocatechol violet (PV) chelating resin for the determination of iron and lead ions in various environmental samples was established. The procedure is based on the sorption of lead(II) and iron(III) ions onto the resin at pH 9, followed by elution with 1 mol/L HNO 3 and determination by flame atomic absorption spectrometry. The influence of alkaline, earth alkaline and some transition metals, as interferents, are discussed. The recoveries for the spiked analytes were greater than 95%. The detection limits for lead and iron by FAAS were 0.37 μg/L and 0.20 μg/L, respectively. Validation of the method described here was performed by using three certified reference materials (SRM 1515 Apple Leaves, SRM 2711 Montana Soil and NRCC-SLRS-4 Riverine Water). The procedure was successfully applied to natural waters and human hair.

The production and isolation of Cu-64 and Cu-67 from zinc target material and other radionuclides

“…Solid phase materials used in immobilization include silica, XAD-resins, activated carbon, polyurethane foam, and styreneethylene glycol dimethyl-acrylate polymer. Complexing agents like dyes, pyrocatechol violet and alizarin red S, have been used to pure organic entities like 1-(2-pyridylazo)2-napthol (PAN) [13].…”

The use of silica gel modified with allyl 6-methyl-4-phenyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate for selective separation and preconcentration of lead in environmental samples

“…The World Health Organization recommended a limit of 10 μg L −1 of lead in drinking water (Baird 1999), which requires a very sensitive measurement technique. Currently, the most common analytical methods for the lead trace determination are flame atomic absorption spectrometry (FAAS) (Dos Santos et al 2004;Silva and Roldan 2009;Soylak et al 2006;Tokalioglu et al 2009;Tuzen et al 2006), electrothermal atomic absorption spectrometry (Martinis et al 2010;Jiang and Hu 2008;Liang et al 2008;Minami et al 2005), inductively coupled plasma atomic emission spectrometry , and inductively coupled plasma-mass spectrometry (Diedjibegovic et al 2012;Diang and Hu 2012). FAAS is still being used because it combines a fast analysis time, a relative simplicity and a cheaper cost.…”

Determination of Copper and Zinc Ions by Flame‐AAS After Preconcentraction Using Sodium Dodecyl Sulfate Coated Alumina Modified with 3‐((1H‐Indol‐3‐yl)‐3,4,5‐trimethyl)‐1H‐indole

“…[1][2][3] The determination of traces of heavy metal ions in environmental samples is restricted by two main difficulties: the very low concentration of heavy metal ions, which may be lower than the detection limit of many analytical techniques including flame atomic absorption spectrometry (FAAS) and the interfering effects of the matrix. In order to achieve accurate, reliable, and sensitive results, preconcentration and separation are needed when the concentrations of analyte metal ions in the original material or the prepared solution are too low to be determined directly by FAAS.…”