Femtosecond laser ablation inductively coupled plasma mass spectrometry: achievements and remaining problems (original) (raw)
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Spectrochimica Acta Part B: Atomic Spectroscopy, 2008
This paper demonstrates the feasibility of performing bulk chemical analysis based on laser ablation for good lateral resolution with only nominal mass ablated per pulse. The influence of repetition rate (1-1000 Hz) and scan speed (1-200 µm/s) using a low energy (30 µJ) and a small spot size (~10 µm) UV-femtosecond laser beam was evaluated for chemical analysis of silica glass samples, based on laser ablation sampling and inductively coupled plasma mass spectrometry (ICP-MS). Accuracy to approximately 14% and precision of 6% relative standard deviation (RSD) were measured. Published by Elsevier B.V.
Spectrochimica Acta Part B-atomic Spectroscopy, 2009
Detection efficiencies of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), defined as the ratio of ions reaching the detector and atoms released by LA were measured. For this purpose, LA of silicate glasses, zircon, and pure silicon was performed using nanosecond (ns) as well as femtosecond (fs) LA. For instance, ns-LA of silicate glass using helium as in-cell carrier gas resulted in detection efficiencies between approximately 1E-7 for low and 3E-5 for high mass range elements which were, in addition, almost independent on the laser wavelength and pulse duration chosen. In contrast, the application of argon as carrier gas was found to suppress the detection efficiencies systematically by a factor of up to 5 mainly due to a less efficient aerosol-to-ion conversion and ion transmission inside the ICP-MS.
Laser ablation inductively coupled plasma mass spectrometry
2004
An dieser Stelle möchte ich mich bei all den Leuten bedanken, die es mir ermöglicht haben diese Arbeit zu machen. Bei Detlef Günther möchte ich mich für dieÜberlassung des interessanten Themas, der Unterstützung bei meinen Ideen, und der ausführlichen Hilfe in allen Belangen bedanken. Meiner Frau möchte ich für das Verständnis von geleistetenÜberstunden, angetretenen Dienstreisen, allen sonstigen Entbehrungen dieser Zeit und die Unterstützung die ich zu hause immer genoss danken. Dank geht auch an Dr. Ingo Horn, mit dem ich viel zusammenarbeitete, und von dem ich sehr viel lernte. Für den Zugang zu wichtiger Infrastruktur am PSI bedanke ich mich bei Dr. Thomas Lippert und Prof. Wokaun. Das Werkstatt-Team hat mit promt hergestellter Hardware viel zum Gelingen dieser Arbeit beigetragen. Danken möchte ich auch Hansruedi Kuhn für die interessanten gemeinsamen Projekte, Disskussionen und Erfolge. Ebenfalls bedanke ich mich bei allen Mitarbeitern der Gruppe für die grosse Unterstützung, die ich jederzeit geniessen konnte.
Evaluation of Inductively Couple Plasma-time-of-Flight Mass Spectrometry for Laser Ablation Analyses
2003
The purpose of this trip to LECO Corporation was to test the non-matrix matched calibration method and the principal component analysis (PCA) method on a laser ablation-inductively coupled plasma-time of flight mass spectrometry (LA-ICP-TOFMS) system. An LA-ICP-TOFMS system allows for multielement single-shot analysis as well as spatial analysis on small samples, because the TOFMS acquires ~JI entire mass spectrum for all ions extracted simultaneously from the ICP. The TOFMS system differs from the double-focusing mass spectrometer, on which the above methods were developed, by having lower sensitivity and lower mass resolution.