Identification of fulvic acids and sulfated and nitrated analogues in atmospheric aerosol by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry.
Identification of fulvic acids and sulfated and nitrated analogues in atmospheric aerosol by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry.
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DOI：
10.1021/ac061320p
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发表时间：
2006-11
影响因子：
7.4
通讯作者：
T. Reemtsma;A. These;Prasanna Venkatachari;Xiaoyan Xia;P. Hopke;A. Springer;M. Linscheid
中科院分区：
文献类型：
--
作者：
T. Reemtsma;A. These;Prasanna Venkatachari;Xiaoyan Xia;P. Hopke;A. Springer;M. Linscheid
采用电喷雾电离傅里叶变换离子回旋共振质谱法（FTICR-MS）对2005年夏季在加州河滨市采集的气溶胶样品中的水溶性有机组分进行了分析。在m/z 220-420范围内测定了约1000个分子种的元素组成，鉴定出黄腐酸、含S、含n、含S和含n四个系列的有机化合物。低分辨率产物离子光谱证明了有机硫酸盐、有机硝酸盐和混合有机硫酸盐和-硝酸盐的存在，它们在结构上彼此密切相关，并与黄腐酸密切相关。这是第一次明确检测大气气溶胶中的黄腐酸分子和硫酸盐成分，甚至是第一次检测硝化类似物。这些物种为大气气溶胶中颗粒有机物质的性质提供了新的线索。
The water-soluble organic fractions of aerosol samples collected in Riverside, CA, in summer 2005 were analyzed by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS). Elemental compositions of about 1000 molecular species were determined in the range m/z 220-420, and four series of organic compounds were identified, fulvic acids, and S-containing, N-containing, and S- and N-containing molecules. Low-resolution product ion spectra proved the presence of organosulfates, organonitrates, and mixed organosulfates and -nitrates that appear to be structurally closely related to each other and to the fulvic acids. This is the first unambiguous detection of fulvic acid molecules and sulfated components in atmospheric aerosol and the first detection even of nitrated analogues. These species provide new clues to the nature of particulate organic matter in atmospheric aerosol.