Occurrence of gas flow rotational motion inside the ICP torch: a computational and experimental study
Occurrence of gas flow rotational motion inside the ICP torch: a computational and experimental study
复制标题
ICP 炬管内气流旋转运动的发生：计算和实验研究
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
A. Bogaerts
中科院分区：
文献类型：
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作者：
Maryam Aghaei;L. Flamigni;H. Lindner;D. Günther;A. Bogaerts
本文计算了一个电感耦合等离子体，它与质谱仪的取样锥相连。研究了辅助气流和载气流旋转运动的发生。操作参数的影响，即，施加的功率和气体流速，以及几何参数，即，取样孔直径和进样器入口直径。我们的计算预测，在较高的应用功率的辅助和载气流内的火炬移动更向前的采样锥，这是验证实验的辅助气流，通过一个Elan 6000 ICP-MS。此外，增加的气体流速也可以修改旋转运动的发生。这对于载气流速尤其如此，其对于减少向后运动具有比辅助气体和冷却气体的流速更显著的效果。此外，较大的取样器孔口（例如，2 mm而不是1 mm）减少了辅助气体路径管线的回流。最后，根据我们的模型，2 mm直径的注射器入口比1.5 mm直径的注射器入口在载气流中引起更多的旋转，这可以通过改变操作参数再次避免。
An inductively coupled plasma, connected to the sampling cone of a mass spectrometer, is computationally investigated. The occurrence of rotational motion of the auxiliary and carrier gas flows is studied. The effects of operating parameters, i.e., applied power and gas flow rates, as well as geometrical parameters, i.e., sampler orifice diameter and injector inlet diameter, are investigated. Our calculations predict that at higher applied power the auxiliary and carrier gas flows inside the torch move more forward to the sampling cone, which is validated experimentally for the auxiliary gas flow, by means of an Elan 6000 ICP-MS. Furthermore, an increase of the gas flow rates can also modify the occurrence of rotational motion. This is especially true for the carrier gas flow rate, which has a more pronounced effect to reduce the backward motion than the flow rates of the auxiliary and cooling gas. Moreover, a larger sampler orifice (e.g., 2 mm instead of 1 mm) reduces the backward flow of the auxiliary gas path lines. Finally, according to our model, an injector inlet of 2 mm diameter causes more rotations in the carrier gas flow than an injector inlet diameter of 1.5 mm, which can be avoided again by changing the operating parameters.
关于电感耦合等离子体质谱检测效率的思考
DOI：
10.1016/j.sab.2012.06.027
发表时间：
2012
期刊：
Spectrochimica Acta Part B: Atomic Spectroscopy
影响因子：
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作者：
K. Niemax
通讯作者：
K. Niemax