An improved method for the high-precision isotopic measurement of boron by thermal ionization mass spectrometry

Xiao, Yaonan; Beary, Ellyn S.; Fassett, J. D.

doi:10.1016/0168-1176(88)83016-7

Cited by 137 publications

(75 citation statements)

References 17 publications

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“…A severe limitation of that method, however, is the strong dependence of the reproducibility on parameters such as size, purity, Na/B ratio and preparation procedures of samples (Xiao et al, 1988). The cesium-metaborate method developed by Spivack and Edmond (1986) and Ramakumar et al (1985) has an analytical uncertainty of about _+0.1-0.4%o (e.g., Spivack and Edmond, 1986;1987;Palmer et al, 1987;Xiao et al, 1988;Palmer and Slack, 1989;Palmer, 1991a;1991b;Palmer and Sturchio, 1990;Palmer et al, 1992;Leeman et al, 1991;Nakamura et al, 1992). The higher precision of the cesium-metaborate method compared to the sodium-metaborate method is due to the higher molecular mass of Cs2BO~ and thus to the considerably smaller relative mass difference of its isotopic species, which limits thermally induced mass-dependent isotopic fractionation.…”

Section: Introductionmentioning

confidence: 99%

Boron isotope variations in nature: a synthesis

1993

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The large relative mass difference between the two stable isotopes of boron, '°B and a 1B, and the high geochemical reactivity of boron lead to significant isotope fractionation by natural processes. Published fi ' 'B values (relative to the NBS SRM-951 standard) span a wide range of ~ 90%0. The lowest fill B values around -30%0 are reported for non-marine evaporite minerals and certain tourmalines. The most laB-enriched reservoir known to date are brines from Australian salt lakes and the Dead Sea of Israel with 511B values up to +59%0. Dissolved boron in present-day seawater has a constant world-wide 6a 'B value of + 39.5%0. In this paper, available c~"B data of a variety of natural fluid and solid samples from different geological environments are compiled and some of the most relevant aspects, including possible tracer applications of boron-isotope geochemistry, are summarized.

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Section: Introductionmentioning

confidence: 99%

Boron isotope variations in nature: a synthesis

1993

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“…The PTIMS method, however, is time-consuming, 15,16 and is generally subject to isobaric interference of Cs 2 CNO + on Cs 2 BO 2 + , in which some additional processes should be employed 17,18 or careful monitoring 4 is necessary to diminish isobaric interference and to achieve good precision for boron isotope. In contrast, the MC-ICP-MS method is less timeconsuming and free from isobaric interference from organic matters.…”

Section: -11mentioning

confidence: 99%

Measurement on high-precision boron isotope of silicate materials by a single column purification method and MC-ICP-MS

Wei

Liu

et al. 2013

J. Anal. At. Spectrom.

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“…The external precision of the azomethine-H method used here was 2 %. The isotopic compositions of boron in all samples were measured by a GV IsoProbe T single magnetic sector thermal ionization mass spectrometer and the P-TIMS method using Cs 2 BO + 2 ions with a graphite loading (Xiao et al, 1988). Two µl of graphite slurry was first loaded onto a degassed tantalum filament, and then approximately 1 µl of sample solution containing about 1-4 µg of boron and an equimolar amount of mannitol were also loaded.…”

Section: Measurements Of Boron Concentration and Isotopic Compositionmentioning

confidence: 99%

Boron isotope fractionation during brucite deposition from artificial seawater

2011

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Abstract. Experiments involving boron incorporation into brucite (Mg(OH) 2 ) from magnesium-free artificial seawater with pH values ranging from 9.5 to 13.0 were carried out to better understand the incorporation behavior of boron into brucite and the influence of it on Mg/Ca-SST proxy and δ 11 B-pH proxy. The results show that both the concentration of boron in deposited brucite ([B] d ) and its boron partition coefficient (K d ) between deposited brucite and final seawater are controlled by the pH of the solution. The incorporation capacity of boron into brucite is almost the same as that into corals, but much stronger than that into oxides and clay minerals. The isotopic compositions of boron in deposited brucite (δ 11 B d ) are higher than those in the associated artificial seawater (δ 11 B isw ) with fractionation factors ranging between 1.0177 and 1.0569, resulting from the preferential incorporation of B(OH) 3 into brucite. Both boron adsorptions onto brucite and the precipitation reaction of H 3 BO 3 with brucite exist during deposition of brucite from artificial seawater. The simultaneous occurrence of both processes determines the boron concentration and isotopic fractionation of brucite. The isotopic fractionation behaviors and mechanisms of boron incorporated into brucite are different from those into corals. The existence of brucite in corals can affect the δ 11 B and Mg/Ca in corals and influences the Mg/Ca-SST proxy and δ 11 B-pH proxy negatively. The relationship between δ 11 B and Mg/Ca in corals can be used to judge the existence of brucite in corals, which should provide a reliable method for better use of δ 11 B and Mg/Ca in corals to reconstruct paleo-marine environment.

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An improved method for the high-precision isotopic measurement of boron by thermal ionization mass spectrometry

Cited by 137 publications

References 17 publications

Boron isotope variations in nature: a synthesis

Boron isotope variations in nature: a synthesis

Measurement on high-precision boron isotope of silicate materials by a single column purification method and MC-ICP-MS

Boron isotope fractionation during brucite deposition from artificial seawater

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