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Evaluation of the isotope ratio performance of an axial time-of-flight ICP mass spectrometer

(1999) ANALYTICAL CHEMISTRY. 71(15). p.3297-3303
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Abstract
The isotope ratio performance of an axial time-of-flight ICP mass spectrometer (Renaissance TOF-ICPMS, LECO Corp.) was evaluated. The isotope ratio precision, expressed as the relative standard deviation (RSD) for 10 successive measurements, was evaluated using multielement standard solutions with analyte concentrations of 50-500 mu g/L. The influence of the acquisition time per replicate measurement was studied by varying it between 0.5 and 300 s. For an acquisition time of 30 s per replicate and an elemental concentration of 500 mu g/L, typical isotope ratio precisions of less than or equal to 0.05% RSD were obtained. The fact that this isotope ratio precision can be obtained for many ratios simultaneously is an especially attractive feature of TOF-ICPMS, In contrast to what was expected, increasing the acquisition time per replicate to values of > 30 s resulted in a slightly deteriorated isotope ratio precision. At short acquisition times (< 10 s), isotope ratio precisions similar to, or better than, the best values ever reported for quadrupole-based instruments were obtained. The latter observation remained valid when working with transient signals of corresponding duration. Mass discrimination was observed to be analogous to that observed with other types of ICPMS instrumentation (similar to 1% per mass unit at midmass), The accuracy attainable was evaluated by comparing Pb isotopic results for a "natural" Pb standard solution obtained by TOF-ICPMS with those obtained by thermal ionization mass spectrometry.
Keywords
STABLE-ISOTOPE, INDUCTIVELY-COUPLED PLASMA, PRECISE DETERMINATION, COMPARTMENTAL MODEL, LEAD ISOTOPES, MS, OPTIMIZATION, ACCURATE, SAMPLES, ELEMENTS

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Chicago
Vanhaecke, Frank, Luc Moens, Richard Dams, Lloyd Allen, and Stuart Georgitis. 1999. “Evaluation of the Isotope Ratio Performance of an Axial Time-of-flight ICP Mass Spectrometer.” Analytical Chemistry 71 (15): 3297–3303.
APA
Vanhaecke, Frank, Moens, L., Dams, R., Allen, L., & Georgitis, S. (1999). Evaluation of the isotope ratio performance of an axial time-of-flight ICP mass spectrometer. ANALYTICAL CHEMISTRY, 71(15), 3297–3303.
Vancouver
1.
Vanhaecke F, Moens L, Dams R, Allen L, Georgitis S. Evaluation of the isotope ratio performance of an axial time-of-flight ICP mass spectrometer. ANALYTICAL CHEMISTRY. 1999;71(15):3297–303.
MLA
Vanhaecke, Frank, Luc Moens, Richard Dams, et al. “Evaluation of the Isotope Ratio Performance of an Axial Time-of-flight ICP Mass Spectrometer.” ANALYTICAL CHEMISTRY 71.15 (1999): 3297–3303. Print.
@article{112408,
  abstract     = {The isotope ratio performance of an axial time-of-flight ICP mass spectrometer (Renaissance TOF-ICPMS, LECO Corp.) was evaluated. The isotope ratio precision, expressed as the relative standard deviation (RSD) for 10 successive measurements, was evaluated using multielement standard solutions with analyte concentrations of 50-500 mu g/L. The influence of the acquisition time per replicate measurement was studied by varying it between 0.5 and 300 s. For an acquisition time of 30 s per replicate and an elemental concentration of 500 mu g/L, typical isotope ratio precisions of less than or equal to 0.05\% RSD were obtained. The fact that this isotope ratio precision can be obtained for many ratios simultaneously is an especially attractive feature of TOF-ICPMS, In contrast to what was expected, increasing the acquisition time per replicate to values of {\textrangle} 30 s resulted in a slightly deteriorated isotope ratio precision. At short acquisition times ({\textlangle} 10 s), isotope ratio precisions similar to, or better than, the best values ever reported for quadrupole-based instruments were obtained. The latter observation remained valid when working with transient signals of corresponding duration. Mass discrimination was observed to be analogous to that observed with other types of ICPMS instrumentation (similar to 1\% per mass unit at midmass), The accuracy attainable was evaluated by comparing Pb isotopic results for a {\textacutedbl}natural{\textacutedbl} Pb standard solution obtained by TOF-ICPMS with those obtained by thermal ionization mass spectrometry.},
  author       = {Vanhaecke, Frank and Moens, Luc and Dams, Richard and Allen, Lloyd and Georgitis, Stuart},
  issn         = {0003-2700},
  journal      = {ANALYTICAL CHEMISTRY},
  keyword      = {STABLE-ISOTOPE,INDUCTIVELY-COUPLED PLASMA,PRECISE DETERMINATION,COMPARTMENTAL MODEL,LEAD ISOTOPES,MS,OPTIMIZATION,ACCURATE,SAMPLES,ELEMENTS},
  language     = {eng},
  number       = {15},
  pages        = {3297--3303},
  title        = {Evaluation of the isotope ratio performance of an axial time-of-flight ICP mass spectrometer},
  url          = {http://dx.doi.org/10.1021/ac990016b},
  volume       = {71},
  year         = {1999},
}

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