Laser ablation-miniature mass spectrometer for elemental and isotopic analysis of rocks

2011 ◽  
Vol 82 (9) ◽  
pp. 094102 ◽  
Author(s):  
M. P. Sinha ◽  
E. L. Neidholdt ◽  
J. Hurowitz ◽  
W. Sturhahn ◽  
B. Beard ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Mass Spectrometer ◽  
Isotopic Analysis ◽  
Miniature Mass Spectrometer

scholarly journals On Applicability of a Miniaturised Laser Ablation Time of Flight Mass Spectrometer for Trace Elements Measurements

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Marek Tulej ◽  
Andreas Riedo ◽  
Maria Iakovleva ◽  
Peter Wurz
Keyword(s):  
Trace Elements ◽  
Laser Ablation ◽  
Mass Spectrometer ◽  
Dynamic Range ◽  
Plasma Chemistry ◽  
Isotopic Analysis ◽  
Radiometric Dating ◽  
Spectrometric Analysis ◽  
Laser Irradiance ◽  
Depth Analysis

We present results from mass spectrometric analysis of NIST standard materials and meteoritic samples conducted by a miniaturised laser ablation mass spectrometer designed for space research. The mass analyser supports investigation with a mass resolution () ≈ 500–600 and dynamic range within seven decades. Nevertheless, to maintain an optimal spectral quality laser irradiances lower than ~1 GW/cm2 are applied so far which results in a spread of RSC values. To achieve the quantitative performance of mass analyser, various effects influencing RSC factors have to be investigated. In this paper we investigate influence of laser irradiance, sampling procedure and plasma chemistry on the quantitative elemental and isotopic analysis. The studies indicate necessity for accurate control of laser characteristics and acquisition procedure. A relatively low irradiance applied causes a negligible sample damage and allows for accumulation of large number of waveforms from one sample location. The procedure yields statistically well averaged data and allows a sensitive in-depth analysis. The quantitative analyses of isotopic composition can be performed with accuracy and precision better as 1% and 2%, for isotopic patterns of elements and clusters, respectively. The numerical integration methods would be preferred to achieve more accurate results. The measurements of Allende sample yield detection of Pb isotopic pattern, nevertheless cluster species are readily observed in spectrum and make the elemental analysis of other trace elements difficult due to isobaric interferences. These detections are of a considerable interest because of possible application of the instrument for in situ elemental and isotopic analysis and radiometric dating of solids.

scholarly journals Direct Chemical Analysis of Solids by Laser Ablation in an Ion Storage Time-of-Flight Mass Spectrometer

2004 ◽  
Vol 76 (5) ◽  
pp. 1249-1256 ◽  
Author(s):  
Gregory L. Klunder ◽  
Patrick M. Grant ◽  
Brian D. Andresen ◽  
Richard E. Russo
Keyword(s):  
Laser Ablation ◽  
Chemical Analysis ◽  
Mass Spectrometer ◽  
Storage Time ◽  
Time Of Flight ◽  
Flight Mass Spectrometer ◽  
Ion Storage

On-Site Diagnosis of Poultry Coccidiosis by a Miniature Mass Spectrometer and Machine Learning

2021 ◽  
Author(s):  
Wei-Chieh Wang ◽  
Hsin-Hsiang Chung ◽  
Ewelina P. Dutkiewicz ◽  
Jhih-Ying Wong ◽  
Wen-Chin Yang ◽  
...  
Keyword(s):  
Machine Learning ◽  
Mass Spectrometer ◽  
Miniature Mass Spectrometer ◽  
Poultry Coccidiosis

scholarly journals Laser ablation aerosol particle time-of-flight mass spectrometer (LAAPTOF): performance, reference spectra and classification of atmospheric samples

2018 ◽  
Vol 11 (4) ◽  
pp. 2325-2343 ◽  
Author(s):  
Xiaoli Shen ◽  
Ramakrishna Ramisetty ◽  
Claudia Mohr ◽  
Wei Huang ◽  
Thomas Leisner ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Aerosol Particle ◽  
Mass Spectrometer ◽  
Size Range ◽  
Aerosol Particles ◽  
Time Of Flight ◽  
Polystyrene Latex ◽  
Dust Particles ◽  
Data Set ◽  
Flight Mass Spectrometer

Abstract. The laser ablation aerosol particle time-of-flight mass spectrometer (LAAPTOF, AeroMegt GmbH) is able to identify the chemical composition and mixing state of individual aerosol particles, and thus is a tool for elucidating their impacts on human health, visibility, ecosystem, and climate. The overall detection efficiency (ODE) of the instrument we use was determined to range from  ∼  (0.01 ± 0.01) to  ∼  (4.23 ± 2.36) % for polystyrene latex (PSL) in the size range of 200 to 2000 nm,  ∼  (0.44 ± 0.19) to  ∼  (6.57 ± 2.38) % for ammonium nitrate (NH4NO3), and  ∼  (0.14 ± 0.02) to  ∼  (1.46 ± 0.08) % for sodium chloride (NaCl) particles in the size range of 300 to 1000 nm. Reference mass spectra of 32 different particle types relevant for atmospheric aerosol (e.g. pure compounds NH4NO3, K2SO4, NaCl, oxalic acid, pinic acid, and pinonic acid; internal mixtures of e.g. salts, secondary organic aerosol, and metallic core–organic shell particles; more complex particles such as soot and dust particles) were determined. Our results show that internally mixed aerosol particles can result in spectra with new clusters of ions, rather than simply a combination of the spectra from the single components. An exemplary 1-day ambient data set was analysed by both classical fuzzy clustering and a reference-spectra-based classification method. Resulting identified particle types were generally well correlated. We show how a combination of both methods can greatly improve the interpretation of single-particle data in field measurements.

Improved detection sensitivity for heavy trace elements using a miniature laser ablation ionisation mass spectrometer

2017 ◽  
Vol 32 (11) ◽  
pp. 2182-2188 ◽  
Author(s):  
R. Wiesendanger ◽  
M. Tulej ◽  
A. Riedo ◽  
S. Frey ◽  
H. Shea ◽  
...  
Keyword(s):  
Trace Elements ◽  
Laser Ablation ◽  
Mass Spectrometer ◽  
Detection Sensitivity ◽  
Laser Spectrometer ◽  
Lunar Meteorite ◽  
Ionisation Mass ◽  
Ionisation Mass Spectrometer

Detecting heavy trace elements with a miniature laser spectrometer on a lunar meteorite.

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