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Elimination of aliasing in LA-ICP-MS by alignment of laser and mass spectrometer†
Citation
Norris, CA and Danyushevsky, L and Olin, P and West, NR, Elimination of aliasing in LA-ICP-MS by alignment of laser and mass spectrometer , Journal of Analytical Atomic Spectrometry, 36, (4) pp. 733-739. ISSN 1364-5544 (2021) [Refereed Article]
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Copyright Statement
© The Royal Society of Chemistry 2021
Abstract
Insufficient sampling of periodic signals results in an unwanted phenomenon known as aliasing. When measuring by LA-ICP-MS it is widely observed that aliasing between laser pulse rates and sampling by sequential ICP-MS instruments creates erroneous variations in the measured element concentrations in the sample. Smoothing the sample flow to the ICP-MS can largely eliminate this variation but reduces spatial resolution of the time-resolved signal and is thus detrimental for imaging with the increasingly popular fast response sample cells. We have developed a fire control circuit that fires the laser in alignment with the measurement cycle of the mass spectrometer to lessen or eliminate aliasing. We describe the device and show that with a conventional quadrupole ICP-MS the technique is able to maintain measurement precision when the extent of mixing between individual laser pulses is reduced by an order of magnitude.
Item Details
Item Type: | Refereed Article |
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Keywords: | LA-ICPMS, aliasing, spectral skew |
Research Division: | Chemical Sciences |
Research Group: | Analytical chemistry |
Research Field: | Analytical spectrometry |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the chemical sciences |
UTAS Author: | Danyushevsky, L (Professor Leonid Danyushevsky) |
UTAS Author: | Olin, P (Dr Paul Olin) |
ID Code: | 148687 |
Year Published: | 2021 |
Web of Science® Times Cited: | 5 |
Deposited By: | CODES ARC |
Deposited On: | 2022-02-02 |
Last Modified: | 2022-11-03 |
Downloads: | 0 |
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