Laser Two-Photon Ionization of Pyrene on Contaminated Soils

Vladimir V. Gridin, Alona Korol, Valery Bulatov, Israel Schechter*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We report a first attempt to use the laser multiphoton ionization method for analysis of trace aromatic compounds on the surface of environmental (soils) and artificial (silica) samples. The measurement setup is composed of a N2 pulsed laser and a fast conductivity detection system. The technique has been tested for detection of pyrene deposited on moist fine-powdered samples. The observed photoionization signals have indicated a gradual increase in the photoionization current and charge as a function of increasing concentration of pyrene/hexane solutions used for sample contamination. Contaminants have been analyzed in several (organic and inorganic) environmental samples, and a method to compensate for matrix effects is suggested. A contamination model is assumed and applied in order to renormalize all signals and provide an useful calibration plot. This calibration plot provides an upper estimate of pyrene LOD as 35 ng/g.

Original languageEnglish
Pages (from-to)3359-3363
Number of pages5
JournalAnalytical Chemistry
Volume68
Issue number19
DOIs
StatePublished - 1 Oct 1996
Externally publishedYes

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