Highly Sensitive Determination of Aromatic Molecules in Droplets by the Surface Laser Two-Photon Ionization

The laser two-photon ionization technique has been applied to a liquid droplet (100-3μl) in order to determine the analytical potential of this technique for a small amount of sample. Surface photoionization was effective to remove the leakage current and allowed use of water as the solvent. Irradia...

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Bibliographic Details
Published in:Analytical Sciences 1996/06/10, Vol.12(3), pp.455-458
Main Authors: OGAWA, Teiichiro, SUMI, Shinichiro, INOUE, Takanori
Format: Article
Language:English
Subjects:
Analytical chemistry
aromatic molecule
Chemistry
droplet
Exact sciences and technology
Ionization
Irradiation
Laser
solution surface
Spectrometric and optical methods
two-photon ionization
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Summary:The laser two-photon ionization technique has been applied to a liquid droplet (100-3μl) in order to determine the analytical potential of this technique for a small amount of sample. Surface photoionization was effective to remove the leakage current and allowed use of water as the solvent. Irradiation at the top surface of the liquid drop showed a wider linear range of the analytical curve than irradiation at its middle body. The detection limit of pyrene was 0.3pg.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.12.455