Experimental study of the copper isotope fractionation between aqueous Cu(II) and covellite, CuS

Ehrlich, Sarah; Butler, Ian B.; Halicz, Ludwik; Rickard, David; Oldroyd, Anthony; Matthews, Alan

doi:10.1016/j.chemgeo.2004.06.010

Cited by 213 publications

(153 citation statements)

References 30 publications

Supporting

Mentioning

139

Contrasting

Order By: Relevance

“…In this way, the internal precision for each analytical session and the long-term reproducibility over a year were obtained. Reproducibility values (calculated as 2 s) for the δ 65 Cu values obtained for the NIST 976 standard along the period of an entire year (n0113) were ±0.027‰ and ±0.039‰ for Ni and Zn, respectively, showing that, as concluded in other recent Cu isotope ratio studies [49][50][51][52][53][54], the use of Ni as internal standard provides superior precision (F-test; F value 02.155; F critical, (P00.05) 0 1.366). In any case, both elements are well-suited for mass bias correction of Cu ratios.…”

Section: Resultssupporting

confidence: 51%

“…For Cu isotopic analysis, two elements are commonly used for this purpose, Zn [5,[43][44][45][46][47][48] and Ni [49][50][51][52][53][54]. According to the literature, both elements seem to be well-suited for mass bias correction affecting the Cu isotope ratio, although marginal precision improvements have been recorded when Ni is used [49][50][51][52][53][54]. As a consequence, a comparative study of Ni and Zn performance was carried out in our investigation.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Copper and tin isotopic analysis of ancient bronzes for archaeological investigation: development and validation of a suitable analytical methodology

et al. 2012

View full text Add to dashboard Cite

Although in many cases Pb isotopic analysis can be relied on for provenance determination of ancient bronzes, sometimes the use of "non-traditional" isotopic systems, such as those of Cu and Sn, is required. The work reported on in this paper aimed at revising the methodology for Cu and Sn isotope ratio measurements in archaeological bronzes via optimization of the analytical procedures in terms of sample pre-treatment, measurement protocol, precision, and analytical uncertainty. For Cu isotopic analysis, both Zn and Ni were investigated for their merit as internal standard (IS) relied on for mass bias correction. The use of Ni as IS seems to be the most robust approach as Ni is less prone to contamination, has a lower abundance in bronzes and an ionization potential similar to that of Cu, and provides slightly better reproducibility values when applied to NIST SRM 976 Cu isotopic reference material. The possibility of carrying out direct isotopic analysis without prior Cu isolation (with AG-MP-1 anion exchange resin) was investigated by analysis of CRM IARM 91D bronze reference material, synthetic solutions, and archaeological bronzes. Both procedures (Cu isolation/no Cu isolation) provide similar δ 65 Cu results with similar uncertainty budgets in all cases (±0.02-0.04 per mil in delta units, k02, n0 4). Direct isotopic analysis of Cu therefore seems feasible, without evidence of spectral interference or matrix-induced effect on the extent of mass bias. For Sn, a separation protocol relying on TRU-Spec anion exchange resin was optimized, providing a recovery close to 100 % without oncolumn fractionation. Cu was recovered quantitatively together with the bronze matrix with this isolation protocol. Isotopic analysis of this Cu fraction provides δ 65 Cu results similar to those obtained upon isolation using AG-MP-1 resin. This means that Cu and Sn isotopic analysis of bronze alloys can therefore be carried out after a single chromatographic separation using TRU-Spec resin. Tin isotopic analysis was performed relying on Sb as an internal standard used for mass bias correction. The reproducibility over a period of 1 month (n042) for the mass bias-corrected Sn isotope ratios is in the range of 0.06-0.16 per mil (2 s), for all the ratios monitored.

show abstract

Section: Resultssupporting

confidence: 51%

Section: Resultsmentioning

confidence: 99%

Copper and tin isotopic analysis of ancient bronzes for archaeological investigation: development and validation of a suitable analytical methodology

et al. 2012

View full text Add to dashboard Cite

show abstract

“…CuS precipitates from Cu(II) aq with Δ 65 Cu Cu(II)aq-CuS = 3.06 ± 0.14 ‰ (Ehrlich et al, 2004). Ehrlich et al (2004) interpreted this result as a redox effect, since the precipitate is reduced to Cu(I)S from the aqueous Cu(II). Like FeS and CuS, Archer (2007) showed that ZnS precipitates from Zn(II) aq with depletion in heavy isotopes (Δ 66 Zn Zn(II)aq-ZnS ~ 0.4 ‰).…”

Section: Comparison With Other Experimental Studiesmentioning

confidence: 99%

“…However, both Ehrlich et al, 2004 andArcher (2007) argued that their values were likely to be kinetic fractionations, CuS and ZnS being significantly less soluble than FeS m (Ksp FeS = 3.5, (Rickard, 2006); (Smith et al, 1976); Ksp sphalerite = 10.93, (Dyrssen and Kremling, 1990); where Ksp values given here are for free hexaqua species and the minerals).…”

Section: Comparison With Other Experimental Studiesmentioning

confidence: 99%

Fe isotope exchange between Fe(II)aq and nanoparticulate mackinawite (FeSm) during nanoparticle growth

Guilbaud

Butler

Ellam

et al. 2010

Earth and Planetary Science Letters

View full text Add to dashboard Cite

show abstract

“…This approach, termed en-SSB hereafter, has been applied widely for Zn and Cu isotope measurements. [10][11][12] Alternatively, the intercepts of linear regression lines of analyte and dopant ratios of standards and samples in ln-ln space are determined. The gradient for both samples and standards is identical, while the difference in intercept values is the difference in isotopic composition between samples and standard.…”

Section: Introductionmentioning

confidence: 99%

A simple combined sample–standard bracketing and inter-element correction procedure for accurate mass bias correction and precise Zn and Cu isotope ratio measurements

Peel

Weiss

Chapman

et al. 2008

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

The modified sample-standard bracketing method (m-SSB) combines a sample-standard bracketing and an inter-element correction procedure to account for instrumental mass fractionation during multi-collector ICP-MS measurements. Precisions for Cu and Zn isotopes in plant and experimental granite leachate samples are in line with those obtained using other mass bias correction techniques. In addition, the inherent temporal drift of mass bias during the analytical session and the empirical linear relationship between dopant and analyte are used to apply independent correction schemes that rigorously check the accuracy of data obtained by m-SSB. Consequently, a very robust isotope data set is obtained. We further suggest the use of a matrix-element spike in inter-element doped standards to increase the mass bias variability. This improves the quality of the empirical relationship between dopant and analyte and enables crosschecking of the m-SSB method when instrumental mass bias is stable.

show abstract

Experimental study of the copper isotope fractionation between aqueous Cu(II) and covellite, CuS

Cited by 213 publications

References 30 publications

Copper and tin isotopic analysis of ancient bronzes for archaeological investigation: development and validation of a suitable analytical methodology

Copper and tin isotopic analysis of ancient bronzes for archaeological investigation: development and validation of a suitable analytical methodology

Fe isotope exchange between Fe(II)aq and nanoparticulate mackinawite (FeSm) during nanoparticle growth

A simple combined sample–standard bracketing and inter-element correction procedure for accurate mass bias correction and precise Zn and Cu isotope ratio measurements

Contact Info

Product

Resources

About