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Bromine isotope ratio measurements in seawater by multi-collector inductively coupled plasma-mass spectrometry with a conventional sample introduction system

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Abstract
A simple and accurate methodology for Br isotope ratio measurements in seawater by multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS) with pneumatic nebulization for sample introduction was developed. The Br+ signals could be measured interference-free at high mass resolution. Memory effects for Br were counteracted using 5 mmol L-1 of NH4OH in sample, standard, and wash solutions. The major cation load of seawater was removed via cation exchange chromatography using Dowex 50WX8 resin. Subsequent Br preconcentration was accomplished via evaporation of the sample solution at 90 A degrees C, which did not induce Br losses or isotope fractionation. Mass discrimination was corrected for by external correction using a Cl-matched standard measured in a sample-standard bracketing approach, although Sr, Ge, and Se were also tested as potential internal standards for internal correction for mass discrimination. The delta Br-81 (versus standard mean ocean bromide (SMOB)) values thus obtained for the NaBr isotopic reference material NIST SRM 977 and for IRMM BCR-403 seawater certified reference material are in agreement with literature values. For NIST SRM 977, the Br-81/Br-79 ratio (0.97291) was determined with a precision a parts per thousand currency sign0.08aEuro degrees relative standard deviation (RSD).
Keywords
ONLINE, RESIN, ELEMENTS, CHLORINE, PRECONCENTRATION, ABUNDANCE RATIO, HALOGEN DEPOSITION, MATRIX ELIMINATION, ICP-MS, IRMM BCR-403, Bromine, Br isotope ratio, Seawater, NIST SRM 977, MC-ICP-MS

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Chicago
Santos de Gois, Jefferson, Paul Vallelonga, Andrea Spolaor, Veerle Devulder, Daniel LG Borges, and Frank Vanhaecke. 2016. “Bromine Isotope Ratio Measurements in Seawater by Multi-collector Inductively Coupled Plasma-mass Spectrometry with a Conventional Sample Introduction System.” Analytical and Bioanalytical Chemistry 408 (2): 409–416.
APA
Santos de Gois, J., Vallelonga, P., Spolaor, A., Devulder, V., Borges, D. L., & Vanhaecke, F. (2016). Bromine isotope ratio measurements in seawater by multi-collector inductively coupled plasma-mass spectrometry with a conventional sample introduction system. ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 408(2), 409–416.
Vancouver
1.
Santos de Gois J, Vallelonga P, Spolaor A, Devulder V, Borges DL, Vanhaecke F. Bromine isotope ratio measurements in seawater by multi-collector inductively coupled plasma-mass spectrometry with a conventional sample introduction system. ANALYTICAL AND BIOANALYTICAL CHEMISTRY. 2016;408(2):409–16.
MLA
Santos de Gois, Jefferson, Paul Vallelonga, Andrea Spolaor, et al. “Bromine Isotope Ratio Measurements in Seawater by Multi-collector Inductively Coupled Plasma-mass Spectrometry with a Conventional Sample Introduction System.” ANALYTICAL AND BIOANALYTICAL CHEMISTRY 408.2 (2016): 409–416. Print.
@article{7171407,
  abstract     = {A simple and accurate methodology for Br isotope ratio measurements in seawater by multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS) with pneumatic nebulization for sample introduction was developed. The Br+ signals could be measured interference-free at high mass resolution. Memory effects for Br were counteracted using 5 mmol L-1 of NH4OH in sample, standard, and wash solutions. The major cation load of seawater was removed via cation exchange chromatography using Dowex 50WX8 resin. Subsequent Br preconcentration was accomplished via evaporation of the sample solution at 90 A degrees C, which did not induce Br losses or isotope fractionation. Mass discrimination was corrected for by external correction using a Cl-matched standard measured in a sample-standard bracketing approach, although Sr, Ge, and Se were also tested as potential internal standards for internal correction for mass discrimination. The delta Br-81 (versus standard mean ocean bromide (SMOB)) values thus obtained for the NaBr isotopic reference material NIST SRM 977 and for IRMM BCR-403 seawater certified reference material are in agreement with literature values. For NIST SRM 977, the Br-81/Br-79 ratio (0.97291) was determined with a precision a parts per thousand currency sign0.08aEuro degrees relative standard deviation (RSD).},
  author       = {Santos de Gois, Jefferson and Vallelonga, Paul and Spolaor, Andrea and Devulder, Veerle and Borges, Daniel LG and Vanhaecke, Frank},
  issn         = {1618-2642},
  journal      = {ANALYTICAL AND BIOANALYTICAL CHEMISTRY},
  keyword      = {ONLINE,RESIN,ELEMENTS,CHLORINE,PRECONCENTRATION,ABUNDANCE RATIO,HALOGEN DEPOSITION,MATRIX ELIMINATION,ICP-MS,IRMM BCR-403,Bromine,Br isotope ratio,Seawater,NIST SRM 977,MC-ICP-MS},
  language     = {eng},
  number       = {2},
  pages        = {409--416},
  title        = {Bromine isotope ratio measurements in seawater by multi-collector inductively coupled plasma-mass spectrometry with a conventional sample introduction system},
  url          = {http://dx.doi.org/10.1007/s00216-015-8820-1},
  volume       = {408},
  year         = {2016},
}

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