Laser two-photon ionization of pyrene on contaminated soils

被引：19

作者：

Gridin, VV ^{[1
]}

Korol, A ^{[1
]}

Bulatov, V ^{[1
]}

Schechter, I ^{[1
]}

机构：

[1] TECHNION ISRAEL INST TECHNOL,DEPT CHEM,IL-32000 HAIFA,ISRAEL

来源：

ANALYTICAL CHEMISTRY | 1996年 / 68卷 / 19期

关键词：

D O I：

10.1021/ac9603237

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 N-2 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.

引用

页码：3359 / 3363

页数：5

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