Scanning ultraviolet two-step laser mass spectroscopy of polycyclic aromatic hydrocarbon distributions on creosote-contaminated soil particles

被引：16

作者：

Fye, JL ^{[1
]}

Nelson, HH ^{[1
]}

Mowery, RL ^{[1
]}

Baronavski, AP ^{[1
]}

Callahan, JH ^{[1
]}

机构：

[1] USN, Res Lab, Div Chem, Washington, DC 20375 USA

来源：

ANALYTICAL CHEMISTRY | 2002年 / 74卷 / 13期

关键词：

D O I：

10.1021/ac025510l

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The distribution of polycyclic aromatic hydrocarbons (PAHs) on creosote-contaminated soil has been examined with scanning ultraviolet two-step laser desorption/laser ionization mass spectroscopy (UV-(LMS)-M-2). The instrument has been constructed in-house by modifying a reflectron time-of-flight mass spectrometer. Two-dimensional chemical maps were accurately generated from model patterned PAH distributions. From examination of three-dimensional substrates, the depth of field of the experiment allows surfaces with roughness of up to 120 mum to be treated as a two-dimensional system and still achieve an accurate representation of the surface deposits. Soil was obtained from a former wood treatment facility. Individual particles of 100-1000 mum were mounted on indexed sample plates and examined by reflectance infrared microscopy, optical microscopy, and imaging UV-(LMS)-M-2. The most intense PAH signals were associated with regions on the particles where clay/organic carbon deposits were found.

引用

页码：3019 / 3029

页数：11

共 63 条

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