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A simple method for high-precision isotopic analysis of chlorine via pneumatic nebulization multi-collector inductively coupled plasma-mass spectrometry

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Abstract
Chlorine isotope ratio measurement using multi-collector ICP-mass spectrometry (MC-ICP-MS) with sample introduction using traditional pneumatic nebulization suffers from spectral interference in addition to low sensitivity. Pronounced memory effects may jeopardize the accuracy of the results and/or the sample throughput. In this work, these limitations were overcome by using (i) high mass resolution (mass resolving power of about 10 000) to resolve spectral interference, (ii) 5 mmol L-1 NH4OH as wash solution to avoid memory effects and (iii) a Cl concentration of >= 70 mg L-1. The major cation load of seawater and chloride salts (NaCl, KCl) sample solutions was efficiently removed without affecting the original isotopic composition of Cl via cation exchange chromatography with Dowex (R) 50WX8 resin. The method developed was demonstrated to be accurate and precise, as attested by the measurement result for the Cl-37/Cl-35 isotope ratio in NIST SRM 975a (experimental value of 0.319765 +/- 0.000022, compared to a reference value of 0.319768 +/- 0.000187 and a precision of similar to 0.007% RSD, n = 3), additionally, the delta Cl-37 value (vs. standard mean ocean chlorine, SMOC) was determined for five different standards; the values ranged from -0.54 to +0.89 parts per thousand.
Keywords
BORON, ICPMS, SEAWATER, RATIOS, BROMINE

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MLA
Santos de Gois, Jefferson, et al. “A Simple Method for High-Precision Isotopic Analysis of Chlorine via Pneumatic Nebulization Multi-Collector Inductively Coupled Plasma-Mass Spectrometry.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, vol. 31, no. 2, 2016, pp. 537–42.
APA
Santos de Gois, J., Costas Rodriguez, M., Vallelonga, P., Borges, D. L., & Vanhaecke, F. (2016). A simple method for high-precision isotopic analysis of chlorine via pneumatic nebulization multi-collector inductively coupled plasma-mass spectrometry. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 31(2), 537–542.
Chicago author-date
Santos de Gois, Jefferson, Marta Costas Rodriguez, Paul Vallelonga, Daniel LG Borges, and Frank Vanhaecke. 2016. “A Simple Method for High-Precision Isotopic Analysis of Chlorine via Pneumatic Nebulization Multi-Collector Inductively Coupled Plasma-Mass Spectrometry.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 31 (2): 537–42.
Chicago author-date (all authors)
Santos de Gois, Jefferson, Marta Costas Rodriguez, Paul Vallelonga, Daniel LG Borges, and Frank Vanhaecke. 2016. “A Simple Method for High-Precision Isotopic Analysis of Chlorine via Pneumatic Nebulization Multi-Collector Inductively Coupled Plasma-Mass Spectrometry.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 31 (2): 537–542.
Vancouver
1.
Santos de Gois J, Costas Rodriguez M, Vallelonga P, Borges DL, Vanhaecke F. A simple method for high-precision isotopic analysis of chlorine via pneumatic nebulization multi-collector inductively coupled plasma-mass spectrometry. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY. 2016;31(2):537–42.
IEEE
[1]
J. Santos de Gois, M. Costas Rodriguez, P. Vallelonga, D. L. Borges, and F. Vanhaecke, “A simple method for high-precision isotopic analysis of chlorine via pneumatic nebulization multi-collector inductively coupled plasma-mass spectrometry,” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, vol. 31, no. 2, pp. 537–542, 2016.
@article{7171497,
  abstract     = {Chlorine isotope ratio measurement using multi-collector ICP-mass spectrometry (MC-ICP-MS) with sample introduction using traditional pneumatic nebulization suffers from spectral interference in addition to low sensitivity. Pronounced memory effects may jeopardize the accuracy of the results and/or the sample throughput. In this work, these limitations were overcome by using (i) high mass resolution (mass resolving power of about 10 000) to resolve spectral interference, (ii) 5 mmol L-1 NH4OH as wash solution to avoid memory effects and (iii) a Cl concentration of >= 70 mg L-1. The major cation load of seawater and chloride salts (NaCl, KCl) sample solutions was efficiently removed without affecting the original isotopic composition of Cl via cation exchange chromatography with Dowex (R) 50WX8 resin. The method developed was demonstrated to be accurate and precise, as attested by the measurement result for the Cl-37/Cl-35 isotope ratio in NIST SRM 975a (experimental value of 0.319765 +/- 0.000022, compared to a reference value of 0.319768 +/- 0.000187 and a precision of similar to 0.007% RSD, n = 3), additionally, the delta Cl-37 value (vs. standard mean ocean chlorine, SMOC) was determined for five different standards; the values ranged from -0.54 to +0.89 parts per thousand.},
  author       = {Santos de Gois, Jefferson and Costas Rodriguez, Marta and Vallelonga, Paul and Borges, Daniel LG and Vanhaecke, Frank},
  issn         = {0267-9477},
  journal      = {JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY},
  keywords     = {BORON,ICPMS,SEAWATER,RATIOS,BROMINE},
  language     = {eng},
  number       = {2},
  pages        = {537--542},
  title        = {A simple method for high-precision isotopic analysis of chlorine via pneumatic nebulization multi-collector inductively coupled plasma-mass spectrometry},
  url          = {http://dx.doi.org/10.1039/c5ja00408j},
  volume       = {31},
  year         = {2016},
}

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