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Kononets, Mikhail; Pakhomova, Svetlana; Rozanov, A. G.; Проскурнин, М. А.

doi:10.1023/a:1016269832258

Cited by 20 publications

(9 citation statements)

References 8 publications

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“…This reagent is used for highly sensitive and selective photometric determination of iron, particularly in environmental water samples. 29 It forms a chelate with iron(II) with the ratio of Fe:ferrozine of 1:3 having an absorption band maximum at 562 nm and does not react with iron(III). 32,33 Apparent molar absorptivity of the chelate at the absorption maximum is e 562 ¼ 28 000 L mol À1 cm À1 , while the absorption of the reagent at this wavelength is negligible.…”

Section: Resultsmentioning

confidence: 99%

“…All the conditions for iron-ferrozine chelate preparation were selected according to our previous study. 29 Procedures. Detection limits were estimated according to IUPAC 30 as a mean square deviation of the blank signal (photothermal-deflection signal from a sample with no iron added) multiplied by a factor of 3 (and multiplied by the calibration plot slope for converting to concentrational units).…”

Section: Methodsmentioning

confidence: 99%

“…All the conditions (time of interaction, reagent ratios) were selected according to the previous study. 29 A 0.5 mL portion of the ascorbic acid solution (25 g L À1 ), 0.5 mL of the acetic buffer solution, and 0.5 mL of a ferrozine solution (5 3 10 À4 M) were added to the necessary amount of iron(III) solution. The range of iron concentrations was 1 3 10 À9 to 1 3 10 À5 M. Next, the total volume was adjusted with water to 20 mL.…”

Section: Methodsmentioning

confidence: 99%

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Photothermal Deflection Determination of Iron(II) with Ferrozine with Sorption Preconcentration on Silufol Plates

Khrycheva

Nedosekin²,

Проскурнин³

et al. 2008

Appl Spectrosc

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Photothermal deflection spectroscopy was applied to the selective detection of iron(II) chelate with ferrozine by its sorption preconcentration on Silufol plates. The linearity range was 1 x 10(-11) - 6 x 10(-8) mol cm(-2) of chelate at the plate surface, which corresponded to 1 x 10(-9) -4 x 10(-6) M of chelate in solution. The limits of detection and quantification are 8 x 10(-12) and 2.5 x 10(-11) mol cm(-2) at the plate from 15 microL of test solution (0.5 nM and 1.5 nM in solution, respectively), and the absolute detection limit is 8 fmol in the whole spot applied to a plate. Characteristics and features of photothermal deflection detection are discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Photothermal Deflection Determination of Iron(II) with Ferrozine with Sorption Preconcentration on Silufol Plates

Khrycheva

Nedosekin²,

Проскурнин³

et al. 2008

Appl Spectrosc

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“…To eliminate this factor, samples were heated and exposed to UV irradiation to decompose the organo-iron complex in the work of Kononets et al [19].…”

Section: Discussionmentioning

confidence: 99%

Simultaneous Separation and Quantification of Iron and Transition Species Using LC-ICP-MS

2011

AJAC

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Using liquid chromatography-inductively coupled plasma-mass spectrometry (LC-ICP-MS), this work investigates the simultaneous separation and quantification of seven transition metal species (Fe, Mn, Co, Ni, Cu, Zn, and Cd), based on a separation scheme published by Dionex company that used the spectrophotometric method for quantification. The LC-ICP-MS method overcomes the shortcomings of conventional ferrozine approaches of measuring Fe(II) and total Fe by two separate runs and calculating Fe(III) by the difference of two runs. The advantage is particularly evident in that organo-iron species are found to be the predominant iron species in many natural waters, and the difference method cannot measure the concentration of Fe(III) because ferrozine will not complex with organo-iron species. In the work reported here, the LC-ICP-MS method is successfully applied to the separation of dissolved iron species, as well as six other divalent transition metals in tap water, deionized water, river water, hot springs, and groundwater samples.

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“…We have chosen Co and Fe determination because (i) the photometric methods for these metals are both sensitive and reliable; 24 (ii) they are based on the same reaction type, chelation; (iii) these methods cover all of the selected procedure types; and (iv) optimized TLS/TLM procedures have low practical LODs under batch and flow conditions. 3,4,[25][26][27][28][29][30][31][32][33][34][35][36] A total of 39 procedures (16 for Fe and 23 for Co) were considered.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Performance Parameters of Photothermal Procedures in Homogeneous and Heterogeneous Systems

et al. 2011

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The main types of analytical procedures used in thermal-lens spectroscopy and microscopy, which are based on photometric reactions in (i) aqueous solutions, (ii) organo-aqueous mixtures, (iii) polymer-containing (nonionic surfactants or polyethylene glycol) aqueous solutions, (iv) water-organic extraction systems, and (v) two-phase aqueous extraction systems, were compared from the viewpoint of both reproducibility and sensitivity. This comparison was made by examples of the determination of cobalt and iron for batch conditions, flow determination, and detection in HPLC, flow-injection analysis (FIA), and μFIA. It was revealed that for all five types, the real analytical efficiency (a decrease in the limit of detection (LOD) as compared to spectrophotometry) is primarily determined by the reaction conditions, provided that excitation of the thermal lens is the same. Aqueous solutions provide more efficient optimization of reaction conditions than do those in organo-aqueous solutions and solvent-extraction water-organic mixtures. The best results are achieved when shifting to polymer-containing aqueous solutions and two-phase aqueous extraction systems, which decreases in the LODs by a factor of 20 -100%.

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Cited by 20 publications

References 8 publications

Photothermal Deflection Determination of Iron(II) with Ferrozine with Sorption Preconcentration on Silufol Plates

Photothermal Deflection Determination of Iron(II) with Ferrozine with Sorption Preconcentration on Silufol Plates

Simultaneous Separation and Quantification of Iron and Transition Species Using LC-ICP-MS

Comparison of Performance Parameters of Photothermal Procedures in Homogeneous and Heterogeneous Systems

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