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Volumn 288, Issue 5463, 2000, Pages 126-128

Nonbiological fractionation of iron isotopes

Author keywords

[No Author keywords available]

Indexed keywords

IRON COMPLEX;

EID: 0034616431     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.288.5463.126     Document Type: Article
Times cited : (254)

References (30)
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    • H. C. Urey, J. Chem. Soc. 1947, 562 (1947); V. B. Potyakov and S. D. Mineev, Geochim. Cosmochim. Acta. 64, 849 (2000).
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    • X. K. Zhu et al., Chem. Geol. 163, 139 (2000).
    • (2000) Chem. Geol. , vol.163 , pp. 139
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  • 10
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    • note
    • standard - 1] × 1000%o, where M = 56 or 57]. We used an "elemental spike" approach to correct for instrumental mass bias; Cu (masses 63 and 65) was added to both samples and standards, and analyses of standards were interleaved with samples. Fe and Cu isotopes were analyzed in alternate cydes.
  • 11
    • 0343246494 scopus 로고    scopus 로고
    • note
    • MFe.
  • 12
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    • note
    • 57Fe) to single analyses of chemically processed samples.
  • 15
    • 0006539942 scopus 로고    scopus 로고
    • Saunders College Publishing, Chicago
    • D. A. Skoog et al., in Instrumental Analysis {Saunders College Publishing, Chicago, 1998}. pp. 675-697.
    • (1998) Instrumental Analysis , pp. 675-697
    • Skoog, D.A.1
  • 16
    • 0342376945 scopus 로고    scopus 로고
    • note
    • 3. About 20% of each solution was used to determine Fe concentrations by ultraviolet-visible light spectrophotometry. The remainder was diluted to a concentration of ∼3 parts per million Fe for isotopic analysis. All experiments were conducted in a clean lab with acid-cleaned Teflon labware, acid-cleaned resin, and ultrapure reagents.
  • 23
    • 0343682151 scopus 로고    scopus 로고
    • note
    • 3 (18). However, it has been shown to be a reasonable approximation for smaller columns (17). In addition, although kinetic effects may either attenuate or amplify isotopic separation, equilibration with ion-exchange resins is generally rapid on the time scales in our experiments, and the kinetics of equilibration between Fe(III) and AG MP-1 resin are at least as rapid as with other anion exchangers (79). The kinetics of Fe(III) ligand exchange are also rapid.
  • 28
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    • (1999) Eos , vol.80 , pp. 479
    • Bullen, T.D.1
  • 29
    • 0343246493 scopus 로고    scopus 로고
    • note
    • 1/2 is the width of the curve at half-height (14). Here, if we neglect tailing, N ∼ 250.
  • 30
    • 0343246492 scopus 로고    scopus 로고
    • note
    • We thank F. Albarède, M. Anbar, B. Beard, R. Eisenberg, D. Farnsworth, J. Hayes, C. Johnson, J. Morgan, G. Ravizza, G. Rossman, E. Schauble, and G. Wasserburg for discussions. This research was conducted at the ICP-MS Laboratory of the University of Rochester, with support from NSF (EAR 9601929 and CHE 9714282) and the NASA Astrobiology Institute.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.