Magnetic field enhancement for femtosecond-laser-ablation mass spectrometry in ambient environments

Y. Lu, Y. S. Zhou, W. Qiu, X. Huang, L. Liu, L. Jiang, J. F. Silvain, Y. F. Lu

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

To improve the sensitivity of open-air femtosecond-laser-ablation mass spectrometry (fs-LA-MS), an external magnetic field was introduced to confine the propagation of the plasma, reduce the plasma neutralization rates, and drive charged particles towards the MS orifice. Signal-to-noise ratios (SNRs) of trace elements, including Al, Si and Pb, in standard NIST samples were obviously improved. The SNR enhancement depends strongly on the direction of the magnetic fields. The maximum enhancement factors were obtained when directing the magnetic fields towards the orifice of the mass spectrometer. The enhancement factors (EFs) of 8.30, 8.22 and 8.50 were achieved for 206Pb, 207Pb and 208Pb in pure lead. The limits of detection (LODs) of 206Pb, 207Pb and 208Pb were lowered from 9.75, 32.9 and 8.19 ppm to 2.32, 6.02 and 1.98 ppm, respectively.

Original languageEnglish (US)
Pages (from-to)2303-2306
Number of pages4
JournalJournal of Analytical Atomic Spectrometry
Volume30
Issue number11
DOIs
StatePublished - Nov 2015

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

Fingerprint Dive into the research topics of 'Magnetic field enhancement for femtosecond-laser-ablation mass spectrometry in ambient environments'. Together they form a unique fingerprint.

Cite this