Molecular Characterization of Organic Aerosols Using Nanospray-Desorption/Electrospray Ionization-Mass Spectrometry

被引：99

作者：

Roach, Patrick J. ^{[1
]}

Laskin, Julia ^{[1
]}

Laskin, Alexander ^{[2
]}

机构：

[1] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA

[2] Pacific NW Natl Lab, William R Wiley Environm & Mol Sci Lab, Richland, WA 99352 USA

来源：

ANALYTICAL CHEMISTRY | 2010年 / 82卷 / 19期

关键词：

DESORPTION ELECTROSPRAY-IONIZATION; BIOMASS BURNING AEROSOLS; FULVIC-ACIDS; CHEMICAL-COMPOSITION; MEXICO-CITY; REAL-TIME; RESOLUTION; SECONDARY; OLIGOMERS; IDENTIFICATION;

D O I：

10.1021/ac101449p

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Nanospray desorption electrospray ionization (nano-DESI) combined with high-resolution mass spectrometry (HR-MS) is a promising approach for the detailed, molecular-level chemical characterization of atmospheric organic aerosols (OA) collected in laboratory and field experiments. The nano-DESI technique possesses distinct advantages of technical simplicity, enhanced sensitivity, and signal stability. In nano-DESI, analyte is desorbed into a solvent bridge formed between two capillaries and the analysis surface, which enables fast and efficient characterization of OA collected on substrates without sample preparation. Stable signals achieved using nano-DESI make it possible to obtain high-quality HR-MS data both for laboratory-generated and field-collected OA using only a small amount of material (<10 ng). Furthermore, nano-DESI enables the efficient detection of chemically labile compounds in OA, which is important for understanding chemical aging phenomena.

引用

页码：7979 / 7986

页数：8

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