High Speed Photographic Study of Wet Droplets and Solid Particles in the Inductively Coupled Plasma
High Speed Photographic Study of Wet Droplets and Solid Particles in the Inductively Coupled Plasma
复制标题
感应耦合等离子体中湿液滴和固体颗粒的高速摄影研究
DOI：
10.1039/a607579g
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发表时间：
1997
影响因子：
3.4
通讯作者：
Xiaoshan Chen
中科院分区：
文献类型：
--
作者：
R. Houk;R. Winge;Xiaoshan Chen
ICP的动态图像以4000帧s-1拍摄。一个完整的含有钇的湿液滴形成了一个淡红色的云，并置在等离子体通常的环境发射结构上。这些液滴云的形状大多像椭圆形或彗星。一些水滴形成小而明亮的球体，然后是指向下游的微弱的缕缕条纹。这种球形云是由某些快速事件引起的，例如在溶剂蒸发的最后阶段液滴爆炸。微弱的条纹是一些残留物，可能是小的固体颗粒。在一个特定的框架中，许多这些微弱的条纹从初始辐射区（IRZ）的尖端突出到正常的分析区（NAZ）。当引入湿滴时，穿过等离子体中心的那部分分析物穿过三个不同的区域（即IRZ，条纹，然后是NAZ），而不是直接从IRZ到NAZ。在等离子体中，两个或三个液滴往往在相同的时间间隔（≈0.12 ms）内一起出现。当溶剂在气溶胶注入等离子体之前被移除时，这些液滴云是看不见的，颗粒条纹也不太明显。不同粒径的Y2O3水溶液（平均直径0.1或3µm）在等离子体的中心线上产生白色条纹，这是由单个固体颗粒造成的。这些观察结果也支持了一般原则，即使用水溶液标准对浆料的响应进行校准的最佳方法是保持颗粒负载，使每个湿液滴包含的固体浆料颗粒不超过一个。
Motion pictures of the ICP were taken at 4000 frames s–1 . An intact wet droplet containing yttrium causes the formation of a pale red cloud juxtaposed on the usual ambient emission structure of the plasma. Most of these droplet clouds are shaped like an oval or a comet. A few droplets produce small, bright spheres followed by faint, wispy streaks that point downstream. Such a spherical cloud is caused by some rapid event such as explosion of a droplet in the final stages of solvent evaporation. The faint streaks are some residue, perhaps small solid particles. In a particular frame, a number of these faint streaks protrude from the tip of the initial radiation zone (IRZ) into the normal analytical zone (NAZ). When wet droplets are introduced, that portion of the analyte that travels through the center of the plasma passes through three distinct regions (i.e., the IRZ, the streaks, then the NAZ), rather than directly from the IRZ to the NAZ. Groups of two or three droplets tend to appear together in the same time interval (≈0.12 ms) in the plasma. These droplet clouds are not seen, and the particle streaks are much less evident, when the solvent is removed before the aerosol is injected into the plasma. Aqueous slurries of Y2O3 in various particle sizes (0.1 or 3 µm mean diameter) produce white streaks along the center line of the plasma, which are attributed to individual solid particles. These observations also support the general precept that calibration of the response for slurries using aqueous solution standards is best accomplished by keeping the particle loading such that each wet droplet contains no more than one solid slurry particle.
由于单个气溶胶液滴和蒸发颗粒而产生的电感耦合等离子体质谱信号波动。
影响因子：
7.4
作者：
Hobbs,SE;Olesik,JW
通讯作者：
Olesik,JW