Chromium isotope ratio measurements in environmental matrices by MC-ICP-MS

Pontér, Simon; Pallavicini, Nicola; Baxter, Douglas C.; Rodushkin, Ilia

doi:10.1039/c6ja00145a

Cited by 11 publications

(2 citation statements)

References 26 publications

(48 reference statements)

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“…In this study, the sensitivity of 52 Cr was ≥300 V mg –1 L using the improved Aridus II with an ice chamber as the sample introduction system. It is significantly increased in comparison with the previously reported 20–180 V mg –1 L for Aridus II, , 7.2–30 V mg –1 L for Apex IR or Spiro, , and 2–15 V mg –1 L for wet plasma (stable introduction system; , Table S3). The trap bottle is located in a sealed 5 °C ice chamber to accelerate the condensation of sweep gas and thus reduce the pressure of the bottle, allowing the solvent vapor to be more readily swept away by argon gas.…”

Section: Resultscontrasting

confidence: 37%

High-Sensitivity Measurement of Cr Isotopes by Double Spike MC-ICP-MS at the 10 ng Level

Zhu

Wang

et al. 2019

Anal. Chem.

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High-sensitivity and high-precision (2 SD ≤ 0.06‰) measurement of chromium (Cr) isotopes at the 10 ng level was successfully carried out using double spike multiple-collector inductively couple plasma mass spectrometry (MC-ICP-MS). To enhance the signal sensitivity and stability, the Aridus II desolvating nebulizer system was improved by placing its waste gas trap bottle in an ice chamber (5 °C cold trap). This setup, beyond Cr isotope analysis, can be applied to most heavy metal isotope measurements. The sensitivity of the 52Cr signal is ≥300 V mg–1 L (with a 1011Ω amplifier and a 110 μL min–1 uptake rate), an enhancement of ≥1.5 times compared to the Aridus II without the cold trap. In addition, the relative standard deviation of the 52Cr signal varied ≤4% over 8 h, demonstrating high stability. The δ53Cr values of common geological reference materials determined using 10 ng of Cr are in excellent agreement with results measured at 25 ng and 50 ng and are consistent with previous determinations, validating the accurate and precise Cr isotope ratio measurements. An empirical method is proposed to correct for the residual (after subtraction) effect of Fe interference on δ53Cr determination. This method relies on a linear relationship between the [Fe]/[Cr] and δ53Cr shift within one analytical session. Finally, we report the δ53Cr values of 19 new reference materials, ranging from −0.44‰ to 0.49‰. Among them, GSS-7 (−0.44 ± 0.02‰, 2 SD, n = 5), GSS-4 (0.48 ± 0.02‰, 2 SD, n = 5), and GSD-10 (0.49 ± 0.05‰, 2 SD, n = 5) can be used as candidate reference materials for interlaboratory comparisons to complement existing ones that are mostly isotopically unfractionated from the bulk silicate earth.

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Section: Resultscontrasting

confidence: 37%

High-Sensitivity Measurement of Cr Isotopes by Double Spike MC-ICP-MS at the 10 ng Level

Zhu

Wang

et al. 2019

Anal. Chem.

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“…δ 53 Cr values increased from soil-to-soil solution to lichens. Wet deposition could be the explanation for the heavy signature found for δ 53 Cr in lichens [46]. ere is a positive correlation between Cr concentrations and increasing proximity to chromite processing steelworks and a negative correlation between δ 53 Cr values and increasing proximity to the steelworks implicating the smelter as the primary airborne Cr contributor in the area.…”

Section: Single-element Patternsmentioning

confidence: 95%

Ranges of B, Cd, Cr, Cu, Fe, Pb, Sr, Tl, and Zn Concentrations and Isotope Ratios in Environmental Matrices from an Urban Area

Pallavicini

Baxter²,

Öhlander

et al. 2018

Journal of Spectroscopy

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Isotopic information may provide powerful insight into the elemental cycling processes which occur in natural compartments. Further implementation of isotopic techniques in natural sciences requires a better understanding of the range of elemental and isotopic compositional variability in environmental matrices. This study assesses the local-scale concentration and isotopic composition variability of nine elements: boron (B), cadmium (Cd), chromium (Cr), copper (Cu), iron (Fe), lead (Pb), strontium (Sr), thallium (Tl), and zinc (Zn) in lysimetric waters, mushrooms, litter, needles, leaves, and lichens. Sequential extractions were also performed on soil samples from 6 depth profiles providing more detailed information on the variability of elemental concentrations and isotope ratios between the elemental pools present in soil. For most of the sample types studied the range of isotopic variability between samples spans almost the entire ranges reported in the literature for natural samples. These results represent a starting point for discussing the role of natural variability in isotopic studies (for example, as a limiting factor in the use of isotopic mixing models) and a baseline for future in-depth studies examining the controls on isotope fraction in natural systems.

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Environmental impacts and risk assessment in the re-use of Cr-bearing pyrolyzed tannery wastes: A case study in a residential area

Ghezzi,

Arrighi,

Mugnaioli

et al. 2024

Applied Geochemistry

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Chromium isotope ratio measurements in environmental matrices by MC-ICP-MS

Cited by 11 publications

References 26 publications

High-Sensitivity Measurement of Cr Isotopes by Double Spike MC-ICP-MS at the 10 ng Level

High-Sensitivity Measurement of Cr Isotopes by Double Spike MC-ICP-MS at the 10 ng Level

Ranges of B, Cd, Cr, Cu, Fe, Pb, Sr, Tl, and Zn Concentrations and Isotope Ratios in Environmental Matrices from an Urban Area

Environmental impacts and risk assessment in the re-use of Cr-bearing pyrolyzed tannery wastes: A case study in a residential area

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