A method for improvement of mass resolution and isotope accuracy for laser ablation time-of-flight mass spectrometers

Wiesendanger, Reto; Tulej, Marek; Grimaudo, Valentine; Cedeño-López, Alena; Lukmanov, Rustam; Riedo, Andreas; Wurz, Peter (2018). A method for improvement of mass resolution and isotope accuracy for laser ablation time-of-flight mass spectrometers. Journal of chemometrics, 33(1), e3081. Wiley 10.1002/cem.3081

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Accumulation of spectra is a common approach for improvement of the signalto‐ noise ratio (SNR) in mass spectrometry. However, severe degradation of the overall spectrum can occur if some individual mass spectra, affected by peak broadening, are included in the accumulation process. In this contribution, we discuss potential sources and effects of spectral distortions by using examples from mass spectra acquired by our miniature laser ablation/ionisation time‐of‐flight mass spectrometer. We show how recent developments in acquisition systems enable to identify individual spectra subjected to peak broadening and present a filtering method capable of systematic and reproducible exclusion of such spectra from the accumulation process. We show that the method can be used on a wide range of materials and present a detailed case study performed on a trevorite mineral sample. Using this method, improvements of the isotope accuracy of Si, Ni, and Cr by factors between 1.6 and 7.7 were achieved. Finally, we discuss the limitations of the method and provide complementary analysis of other materials in the supplementary documents provided with this contribution. KEYWORDS

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry
08 Faculty of Science > Physics Institute

UniBE Contributor:

Wiesendanger, Reto; Tulej, Marek; Riedo, Valentine; Cedeño López, Alena; Lukmanov, Rustam and Wurz, Peter

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry
500 Science > 520 Astronomy
600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

0886-9383

Publisher:

Wiley

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

28 Nov 2018 12:36

Last Modified:

24 Oct 2019 07:25

Publisher DOI:

10.1002/cem.3081

BORIS DOI:

10.7892/boris.121379

URI:

https://boris.unibe.ch/id/eprint/121379

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