Simultaneous preconcentration and speciation of iron(II) and iron(III) in water samples by 2-mercaptobenzimidazole-silica gel sorbent and flow injection analysis system

Bagheri, Habib; Gholami, Ali; Najafi, Amir

doi:10.1016/s0003-2670(00)01151-x

Cited by 63 publications

(25 citation statements)

References 25 publications

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“…It is the fourth most abundant element in the earth's crust, 1 and has essential roles in biological systems as a trace element. Iron is necessary for hemoglobin synthesis and oxidative processes of living tissues.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Speciation of Iron(II) and Iron(III) by Ion Chromatography with Chemiluminescence Detection

et al. 2012

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This study reports on a method for the speciation of iron in aqueous samples by the simultaneous analysis of divalent and trivalent iron ions with ion chromatography equipped with chemiluminescence detection (IC-CLD). Ferrous and ferric ions are first chelated by pyridine-2,6-dicarboxylic acid (PDCA) to form complexed anions, and separated by a mixed-bed ion-exchange column. The separated complexed ions are then detected with a CLD system containing luminol and hydrogen peroxide in a basic solution. This luminescence system has a linear dynamic range of ca. 3 orders of magnitude, with method detection limits as low as 7 μg L -1 for Fe(II) and 3 μg L -1 for Fe(III), measured in the simultaneous detection mode. This system resists interferences from common cations such as Cd, Ca, Cr, Cu, Mg, Ni, Pb, and Zn. Evaluation by analyzing real samples shows that this method is rapid, accurate, sensitive, and selective.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Speciation of Iron(II) and Iron(III) by Ion Chromatography with Chemiluminescence Detection

et al. 2012

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“…20 Bagheri et al proposed a procedure for the simultaneous preconcentration and speciation of iron(II) and iron(III) in water samples by 2-mercaptobenzimidazole-silica gel. 21 Bag et al studied the preconcentration of Zn, Co and Ni using poly(ethylene terephthalate) fibers grafted with methacrylic acid as a solidphase extractor, and applied the results to the determination of these metals in river water and synthetic seawater with high precision. 22 In this work, Ambersorb 572, used as a solid-phase extractor for some organic species before, was firstly used for trace metals as a solid-phase extractor.…”

Section: Faasmentioning

confidence: 99%

Determination of Iron, Manganese and Zinc in Water Samples by Flame Atomic Absorption Spectrophotometry after Preconcentration with Solid-Phase Extraction onto Ambersorb 572

Kendüzler

Türker

2002

ANAL. SCI.

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A solid-phase extraction method for the preconcentration of Fe, Mn and Zn on a column containing Ambersorb 572 has been developed, and the determination of Fe, Mn and Zn in water using a flame atomic absorption spectrophotometer (FAAS) has been performed. The optimum preconcentration parameters of the procedure have been determined. The effect of the pH, complexing agent, amount of adsorbent, flow rate, concentration and volume of the elution solution and interfering ions on the recovery of the analytes were investigated. The recoveries of Fe, Mn and Zn were 99 ± 3%, 98 ± 3% and 99 ± 3% at the 95% confidence level, respectively, under the optimum conditions. Fe, Mn and Zn were preconcentrated up to 50, 100, 200, respectively. The limits of detection of Fe, Mn and Zn are 2.5, 0.68 and 0.24 µg l -1 , respectively. The adsorption capacity of the adsorbent was found to be 10.9, 13.1 and 21.5 mg g -1 for Fe, Mn and Zn, respectively. The method has been applied to the determination of these metal ions in tap-water and river-water samples. The precision and the accuracy of the method is very good. The relative standard deviation and the relative error are lower than 4%.

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“…Iron is the fourth most abundant element in the earth's crust; it is present in a variety of rock and soil minerals. Concerning its biological activity, iron is a highly versatile element, serving as active center of proteins responsible for oxygen and electrons transference in metalloenzymes such as oxidases and dehydratases [11,12]. Therefore, it is very important to develop sensitive methods for quantitative determination of trace Fe in various matrices.…”

Section: Introductionmentioning

confidence: 99%

Determination of Iron by Dispersive Liquid-Liquid Microextraction Procedure in Environmental Samples

Rojas¹,

Ojeda²,

Pavón³

2012

CHEMISTRY

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A greener analytical procedure based on dispersive liquid-liquid microextraction (DLLME) coupled to flame atomic absorption spectrometry (FAAS) detection was developed. Various influencing factors on the separation and preconcentration of iron, such as the acidity of the aqueous solution, extraction and disperser solvent type and their volume have been investigated systematically, and the optimized operation conditions were established. Under the optimum conditions i.e., pH 4.0, [DPTH] = 5x10-3%, a preconcentration factor of 45 was reached. The lower limit of detection (LOD) obtained under the optimal conditions was 9 μg L-1. The precision for 8 replicate determinations at 50 and 100 μg L-1 of Fe were 1.8 % and 4.4 % relative standard deviation (R.S.D.), respectively. The calibration graph using the preconcentration method was linear from 10 to 5000 μg L-1, with a correlation coefficient of 0.9904. The proposed method was successfully applied to the preconcentration and determination of iron in food, vegetation, soil and water samples.

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Simultaneous preconcentration and speciation of iron(II) and iron(III) in water samples by 2-mercaptobenzimidazole-silica gel sorbent and flow injection analysis system

Cited by 63 publications

References 25 publications

Simultaneous Speciation of Iron(II) and Iron(III) by Ion Chromatography with Chemiluminescence Detection

Simultaneous Speciation of Iron(II) and Iron(III) by Ion Chromatography with Chemiluminescence Detection

Determination of Iron, Manganese and Zinc in Water Samples by Flame Atomic Absorption Spectrophotometry after Preconcentration with Solid-Phase Extraction onto Ambersorb 572

Determination of Iron by Dispersive Liquid-Liquid Microextraction Procedure in Environmental Samples

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