Quantification of Cr(VI) in soil samples from a contaminated area in northern Italy by isotope dilution mass spectrometry

Guidotti, Laura; Queipo-Abad, Silvia; Rodríguez-González, Pablo; Alonso, J. Ignacio García; Beone, Gian Maria

doi:10.1007/s11356-015-4963-z

Cited by 21 publications

(19 citation statements)

References 15 publications

(26 reference statements)

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“…Probably, when the air-dry soil was wetted with water and extracted in an alkaline solution, iron (II/III)-bearing minerals were solubilized and were capable of reducing Cr(VI) to Cr(III). The capability of Fe(II) to reduce Cr(VI) in a solution over a pH range 2–10 and correlation between reduction of Cr(VI) and the presence of iron in extract of soil was reported by Guidotti et al [37]. Hence, the formed Cr(III) was associated with Fe(III)-hydroxide forming Cr(III)-Fe(III)-precipitate, and removed from the extract during the filtration step.…”

Section: Resultsmentioning

confidence: 85%

“…Considering the reactions which could take place in the alkaline extract, the reduction of Cr(VI) to Cr(III) in the presence of humic substances, solubilised in an alkaline solution (pH about 9.5), is not excluded. Such a process may be facilitated in the presence of soluble Fe(III), which first can be reduced to Fe(II) by humic substances and then oxidized by Cr(VI) in a redox cycle [37]. The high content of Fe found in the extract of organic soil spiked with BaCrO 4 (mass fraction of Fe = 5.7 ± 0.3 mg g −1 , n = 3) indicates that Fe may induce the reduction of Cr(VI).…”

Section: Resultsmentioning

confidence: 99%

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Speciation of Chromium in Alkaline Soil Extracts by an Ion-Pair Reversed Phase HPLC-ICP MS Method

Leśniewska

Godlewska‐Żyłkiewicz

2019

Molecules

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The aim of this work was to study by a hyphenated HPLC-ICP MS technique the chromium species released during alkaline extraction of various soils collected from a contaminated area of an old tannery. An ultrasound-assisted extraction procedure using 0.1 mol L−1 Na2CO3 solution was developed for the release of chromium species from the soil. The chromium species in the soil extracts were separated on a C8 column using EDTA and TBAH solution as a mobile phase. The use of an ICP-QQQ MS spectrometer in tandem mass configuration (MS/MS) combined with an octopole reaction system (ORS3) pressurized with helium allows one to eliminate spectral interferences during Cr determination in the soil extracts. The detection limit of the procedure was 0.08 µg L−1 for Cr(III) and 0.09 µg L−1 for Cr(VI) species. The trueness of the IP RP HPLC-ICP MS method was proved by an analysis of CRM 041 and CRM 060. The advantage of the proposed method is the analysis of soil extracts without their preliminary neutralization, which limits the losses of Cr(VI) due to the reduction process. The analysed soils mainly contained chromium in immobile forms (94.6–98.5% of the total Cr content). In all alkaline soil extracts mostly the Cr(VI) form was found, but in the extract of organic soils Cr(III) was also present. This arose from the reduction of Cr(VI) species by organic matter (humic acids) and Fe(II). The amount of formed Cr(III) species was dependent on the type of soil (content of organic matter, Mn and Fe) and its moistness. For the first time, the presence of neutral and non-polar chromium fractions in the soil extracts was also demonstrated. It was found that reliable speciation analysis results could be obtained for mineral soils.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Speciation of Chromium in Alkaline Soil Extracts by an Ion-Pair Reversed Phase HPLC-ICP MS Method

Leśniewska

Godlewska‐Żyłkiewicz

2019

Molecules

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“…Single-spike isotope dilution mass spectrometry (IDMS) has also been explored, where samples are spiked with only one isotope corresponding to the species of interest. Guidotti et al demonstrated reliable extraction and quantification of Cr(VI) in contaminated soils using Cr(VI) and ethylenediaminetetraacetic acid (EDTA) extraction, with minimal reduction of Cr(VI) even in soils with high Fe and organic matter content (Guidotti, Abad, Rodríguez-González, Alonso, & Beone, 2015).…”

Section: On-line Analytical Techniquesmentioning

confidence: 99%

Chromium speciation in foodstuffs: A review

et al. 2018

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Numerous critical reviews have evaluated exposure to toxic and carcinogenic hexavalent chromium (Cr(VI)) from a number of pathways; including workplace air, cement and packaging materials. The contribution of foodstuffs to dietary Cr(VI) has been increasingly under investigation, however no summary of this work has been carried out. The objective of this article is to review the last twenty years of chromium speciation research in foodstuffs. Alkaline extraction, used for chromium speciation in other solids, is the most widely-reported procedure. Previous measurement of Cr(VI) in foodstuffs is questionable due to the reducing power of organic matter and antioxidants, leading to the development of speciated isotope dilution mass spectrometry (SIDMS) techniques to monitor interconversions. Evaluation of the genotoxicity of trivalent chromium (Cr(III)), which acts through a different pathway to that of Cr(VI), requires reconsideration towards measurement of Cr(III), which is present at higher concentrations in foodstuffs following reduction of the more-bioavailable Cr(VI).

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“…Isotope dilution mass spectrometry (IDMS) is a calibration technique able to accurately quantify Cr(VI) from soil samples. When multiple spiking is applied Cr(III)-Cr(VI) redox interconversions during sample preparation can be corrected for (Fabregat-Cabello et al, 2012;Garcia Alonso and Rodriguez-Gonzalez, 2013;Guidotti et al, 2015;Rahman et al, 2005). The analytical procedure, standardised by USEPA as method 6800 (USEPA, 2007) requires the addition of known amounts of isotopically enriched Cr(III) and Cr(VI) to the samples before extraction.…”

Section: Introductionmentioning

confidence: 99%

“…preventing its oxidation to Cr(VI) throughout the analytical procedure; ii) it facilitates the extraction of Cr(VI) from the solid sample by complexation of other metals (e.g., Ba, Pb, Sr, Zn) forming insoluble chromates (Fabregat-Cabello et al, 2012;Guidotti et al, 2015). Therefore, since EDTA was able to prevent Cr(III) oxidation to Cr(VI) during extraction, the use of a single isotopicallylabelled Cr(VI)-spike provides an accurate quantification of Cr(VI) in soil by IDMS (Fabregat-Cabello et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Hexavalent chromium quantification by isotope dilution mass spectrometry in potentially contaminated soils from south Italy

et al. 2019

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Due to carcinogenicity of hexavalent chromium [Cr(VI)], its accurate quantification in Crcontaminated soils is of paramount importance. The aim of this work was to quantify Cr(VI) by species-specific IDMS in soil samples from two Italian case studies: A) farmland potentially contaminated by pseudo-total Cr and Zn and heavy hydrocarbons due to past illegal burial of tannery wastes; B) Solofrana valley where volcanic soils are potentially contaminated by pseudototal Cr and Cu due to tannery activities. Hexavalent Cr extraction from soils was performed by focused microwaves (5 min at 80 °C) using 50 mM EDTA, followed by the separation of Cr species by IC and detection by ICP-MS. The Cr(VI) extracted from 20 soil samples of case study A ranged from 0.15 to 11.18 µg g -1 , with 70 % of samples exceeding the Cr(VI) screening value set by Italian Parliament for residential/urban soil to assess their potential contamination. Higher levels of Cr(VI)

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Quantification of Cr(VI) in soil samples from a contaminated area in northern Italy by isotope dilution mass spectrometry

Cited by 21 publications

References 15 publications

Speciation of Chromium in Alkaline Soil Extracts by an Ion-Pair Reversed Phase HPLC-ICP MS Method

Speciation of Chromium in Alkaline Soil Extracts by an Ion-Pair Reversed Phase HPLC-ICP MS Method

Chromium speciation in foodstuffs: A review

Hexavalent chromium quantification by isotope dilution mass spectrometry in potentially contaminated soils from south Italy

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