In situ single‐particle characterization at Cape Grim
In situ single‐particle characterization at Cape Grim
复制标题
格里姆角的原位单粒子表征
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
M. Schein
中科院分区：
文献类型：
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作者：
D. Murphy;D. Thomson;A. Middlebrook;M. Schein
本文描述了在格里姆角使用激光质谱仪(PAMS)进行颗粒分析的情况。对仪器的几次改动提高了电离的一致性，简化了数据分析，并将最小可分析颗粒尺寸减少到0.16μm。在格里姆角清洁的海洋条件下，棕榈树分析的几乎所有颗粒都含有一些海盐。在清洁的海洋条件下发现的几乎所有硫酸盐都与海盐混合，而不是单独存在于硫酸铵或硫酸气雾剂中。即使在清洁的海洋气团中，也能在少数颗粒物中检测到铬、铁和锡等金属。质谱图中的NO+峰与镁、钙和锶有关。这种结合可能是由不同盐类的保水性或不同的反应活性引起的。它提醒人们，对于多相化学，需要考虑除氯化钠之外的其他海盐成分。
This paper describes operation of the particle analysis by laser mass spectrometry (PALMS) instrument at Cape Grim. Several changes to the instrument improved the uniformity of ionization, simplified data analysis, and reduced the minimum analyzable particle size to 0.16 μm. Almost all of the particles analyzed by PALMS at Cape Grim during clean marine conditions contained some sea salt. Almost all of the sulfate found during clean marine conditions was mixed with sea salt rather than in separate ammonium sulfate or sulfuric acid aerosols. Metals such as Cr, Fe, and Sn were detected in a few particles even in clean marine air masses. An NO + peak in the mass spectra was associated with Mg, Ca, and Sr. This association could be caused either by the water retention of various salts or by different reactivities. It provides a reminder that other components of sea salt besides NaCl need to be considered for heterogeneous chemistry.