Simultaneous determination of iron(II) and -(III) by ion chromatography with post-column reaction

Saitoh, Hiroko; Oikawa, Kikuo

doi:10.1016/s0021-9673(01)81926-9

Cited by 21 publications

(5 citation statements)

References 7 publications

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“…There are many techniques reported for determination of iron in the literature: [1][2][3][4][5][6][7][8][9][10][11][12][13][14] colorimetry, 1 ICP, 2 atomic absorption spectrometry [3][4][5] and chromatography. [8][9][10][11][12][13] Most of the methods are based on determination of one form of the iron and/or the total iron. [1][2][3][4][5][6][7][8] Saitoh and Oikawa reported determination of Fe(II) and Fe(III) by ion chromatography, where Fe(III) was reduced to Fe(II) by ascorbic acid.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] Saitoh and Oikawa reported determination of Fe(II) and Fe(III) by ion chromatography, where Fe(III) was reduced to Fe(II) by ascorbic acid. 10 Moses et al reported determination of Fe(III) and Fe(II), but in determination of Fe(III) some interference occurred when Fe(II) was present. 11 Determination of various forms of the same element (speciation) is a worthwhile task in analytical chemistry due to the importance of environmental analysis and the need for understanding of fundamental biochemical reactions.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous Determination of Fe(III) and Fe(II) Ions via Complexation with Salicylic Acid and 1,10-Phenanthroline in Microcolumn Ion Chromatography

2008

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Fe(III) and Fe(II) ions were separated and determined via in-column and post-column reactions with salicylic acid and 1,10-phenanthroline by microcolumn ion chromatography with UV-Vis detection. The separation could be achieved on a silica microcolumn using an aqueous ethanol solution of salicylic acid as eluent. The effluent from the column was then mixed with aqueous ethanol solution of 1,10-phenanthroline and detected at 518 nm. Fe(III) ion was detected as the complex with salicylic acid, whereas Fe(II) ion was detected as the complex with 1,10-phenanthroline. The detection limits with 0.25 mL injection volume at S/N = 3 were 0.21 and 0.10 mg L -1 for Fe(III) and Fe(II), respectively. Increasing the injection volume of sample, e.g., 5.1 mL, improved the sensitivity; the detection limits at S/N = 3 were 12 and 9.2 mg L -1 for Fe(III) and Fe(II), respectively. The present system was applied to the determination of iron in a local well water sample.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Fe(III) and Fe(II) Ions via Complexation with Salicylic Acid and 1,10-Phenanthroline in Microcolumn Ion Chromatography

2008

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“…The following instrumental methods have been proposed for iron determination: spectrophotometry, − amperometry, adsorptive stripping voltammetry, ion chromatograph, − atomic absorption spectrometry, ,− and inductively coupled plasma atomic emission spectrometry. − However, most of these methods are limited to the determination of total dissolved and suspended concentrations. The determination of the oxidation states of iron in a variety of samples is usually achieved by complexation with specific chelating agents followed by spectrophotometric measurement. − Most methods for the determination of Fe(III) are based on colorimetric determination of the Fe(II) concentration, followed by a separate determination of the total Fe concentration after reduction of Fe(III).…”

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confidence: 99%

“…11 Accordingly, there has been an increasing need for a highly sensitive method for analysis of iron speciation in environmental and biochemical studies, 12 and the determination of Fe(III) in the presence of Fe(II) has received particular attention. The following instrumental methods have been proposed for iron determination: spectrophotometry, [12][13][14][15][16][17][18][19][20] amperometry, 21 adsorptive stripping voltammetry, 22 ion chromatograph, [23][24][25] atomic absorption spectrometry, 3,[26][27][28] and inductively coupled plasma atomic emission spectrometry. [29][30][31][32] However, most of these methods are limited to the determination of total dissolved and suspended concentrations.…”

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confidence: 99%

Speciation of Dissolved Iron(III) and Iron(II) in Water by On-Line Coupling of Flow Injection Separation and Preconcentration with Inductively Coupled Plasma Mass Spectrometry

2000

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A method has been developed for the speciation of trace dissolved Fe(II) and Fe(II) in water by on-line coupling of flow injection separation and preconcentration with inductively coupled plasma mass spectrometry (ICPMS). Selective determination of Fe(III) in the presence of Fe(II) was made possible by on-line formation and sorption of the Fe(III)-pyrrolidinecarbodithioate (PDC) complex in a PTFE knotted reactor over a sample acidity range of 0.07-0.4 mol L(-1) HCl, elution with 1 mol L(-1) HNO3, and detection by ICPMS. Over a sample acidity range of 0.001-0.004 mol L(-1) HCl, the sum of Fe(III) and Fe(II), i.e., Fe(III + II), could be determined without the need for preoxidation of Fe(II) to Fe(III). The concentration of Fe(II) was obtained as the difference between those of Fe(III + II) and Fe(III). With a sample flow rate of 5 mL min(-1) and a 30-s preconcentration time, an enhancement factor of 12, a retention efficiency of 80%, and a detection limit (3s) of 0.08 microg L(-1) were obtained at a sampling frequency of 21 samples h(-1). The relative standard deviation (n = 11) was 2.9% at the 10 microg L(-1) Fe(III) level. Recoveries of spiked Fe(III) and Fe(II) in local tap water, river water, and groundwater samples ranged from 95% to 103%. The concentrations of Fe(III) and Fe(II) in synthetic aqueous mixtures obtained by the proposed method were in good agreement with the spiked values. The result for total iron concentration in the river water reference material SLRS-3 was in good agreement with the certified value. The method was successfully applied to the determination of trace dissolved Fe(III) and Fe(II) in local tap water, river water, and groundwater samples.

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“…Saitoh and Oikawa [11] simultaneously determined Fe(II) and Fe(III) by post-column reaction (PCR) detection. The methods are based on cation exchange, anion exchange, and ion-pairing chromatography.…”

Section: Ironmentioning

confidence: 99%

Chemical Speciation

Fritz

Gjerde²

2009

Ion Chromatography

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Simultaneous determination of iron(II) and -(III) by ion chromatography with post-column reaction

Cited by 21 publications

References 7 publications

Simultaneous Determination of Fe(III) and Fe(II) Ions via Complexation with Salicylic Acid and 1,10-Phenanthroline in Microcolumn Ion Chromatography

Simultaneous Determination of Fe(III) and Fe(II) Ions via Complexation with Salicylic Acid and 1,10-Phenanthroline in Microcolumn Ion Chromatography

Speciation of Dissolved Iron(III) and Iron(II) in Water by On-Line Coupling of Flow Injection Separation and Preconcentration with Inductively Coupled Plasma Mass Spectrometry

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