TITLE

Sensitive elemental analysis of aqueous colloids by laser-induced plasma spectroscopy

AUTHOR(S)
Pu, X.Y.; Ma, W.Y.; Cheung, N.H.
PUB. DATE
October 2003
SOURCE
Applied Physics Letters;10/20/2003, Vol. 83 Issue 16, p3416
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Highly sensitive elemental analysis of lead carbonate colloids was demonstrated by two-pulse laser-induced plasma spectroscopy. The first laser pulse created a vapor plume with the particulates concentrated in space because of their slower propagation. They were then ablated by an ArF laser pulse that efficiently atomized and excited the lead analyte. The lead emissions were much enhanced, while the background continuum interference was minimized. The detection limit for lead was shown to be 14.2 ppb, compared with 13 ppm achieved by conventional laser-induced breakdown spectroscopy of lead ions in water and 210 ppb for lead aerosols. © 2003 American Institute of Physics.
ACCESSION #
11097761

 

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