Particle analysis by laser mass spectrometry (PALMS) studies of ice nuclei and other low number density particles
Particle analysis by laser mass spectrometry (PALMS) studies of ice nuclei and other low number density particles
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DOI：
10.1016/j.ijms.2006.05.013
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发表时间：
2006-12-01
影响因子：
1.8
通讯作者：
Murphy, Daniel M.
中科院分区：
文献类型：
--
作者：
Cziczo, Daniel J.;Thomson, David S.;Murphy, Daniel M.
已经表明，有效地引发冻结的粒子，称为冰核（IN），通常在背景大气中的浓度小于101（-1）。这些颗粒的低数密度已经提出了显著的分析挑战，并且这些颗粒的尺寸和组成的确定以及因此的来源在历史上依赖于电子显微镜（EM）。单粒子质谱仪可以提供更好的时间分辨率和减少的采样伪影。激光质谱（PALMS）仪器，激光解吸/电离质谱仪，需要有效地大小和分析粒子的数量密度非常低的粒子分析的修改，在这里描述。传统的EM研究的比较和未来的应用，这种方法来解决其他当代大气问题进行了讨论。(c)2006 Elsevier B. V.保留所有权利。
It has been shown that particles which effectively initiate freezing, known as ice nuclei (IN), are normally found at concentrations less than 101(-1) in the background atmosphere. The low number density of these particles has presented significant analytical challenges, and determination of the size and composition, and thus the origin, of these particles has historically relied upon electron microscopy (EM). Single particle mass spectrometers can provide better time resolution and reduced sampling artifacts. The modifications to the particle analysis by laser mass spectrometry (PALMS) instrument, a laser desorption/ionization mass spectrometer, required to efficiently size and analyze particles with very low number density, are described here. A comparison to traditional EM studies is made and future applications of this method to solve other contemporary atmospheric problems are also discussed. (c) 2006 Elsevier B.V. All rights reserved.