Ion Clouds in the Inductively Coupled Plasma Torch: A Closer Look through Computations.
Ion Clouds in the Inductively Coupled Plasma Torch: A Closer Look through Computations.
复制标题
电感耦合等离子体炬中的离子云：通过计算仔细观察。
DOI：
10.1021/acs.analchem.6b01189
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发表时间：
2016
影响因子：
7.4
通讯作者：
A. Bogaerts
中科院分区：
文献类型：
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作者：
Maryam Aghaei;H. Lindner;A. Bogaerts
我们通过计算研究了在连接到采样锥体的感应耦合等离子体炬中引入铜元素颗粒的情况，包括首次对样品进行电离。样品以液体颗粒的形式插入，并在整个炬管内流动，即从注射器入口一直到电离并到达采样器。提供了炬管内离子云的空间位置以及采样器孔口和炬管排气口位置处的铜物质通量的详细信息。研究了轴上和离轴注射的效果。我们清楚地表明，轴上注入材料的离子云距离采样器更近，径向扩散较少。这保证了通过采样器锥体的更高传输效率。此外，我们的模型揭示了施加功率和流速的最佳范围，这确保了炬管内离子云的正确位置，即距离采样器足够近，以增加可以进入质谱仪的分数，并且将朝向排气的材料损失最小化，以及足够高的等离子体温度以实现高效电离。
We have computationally investigated the introduction of copper elemental particles in an inductively coupled plasma torch connected to a sampling cone, including for the first time the ionization of the sample. The sample is inserted as liquid particles, which are followed inside the entire torch, i.e., from the injector inlet up to the ionization and reaching the sampler. The spatial position of the ion clouds inside the torch as well as detailed information on the copper species fluxes at the position of the sampler orifice and the exhausts of the torch are provided. The effect of on- and off-axis injection is studied. We clearly show that the ion clouds of on-axis injected material are located closer to the sampler with less radial diffusion. This guarantees a higher transport efficiency through the sampler cone. Moreover, our model reveals the optimum ranges of applied power and flow rates, which ensure the proper position of ion clouds inside the torch, i.e., close enough to the sampler to increase the fraction that can enter the mass spectrometer and with minimum loss of material toward the exhausts as well as a sufficiently high plasma temperature for efficient ionization.
应用单分析物液滴和颗粒注射的电感耦合等离子体光谱法研究样品引入和等离子体相关的基质效应
DOI：
10.1016/j.sab.2011.12.003
发表时间：
2012
期刊：
Spectrochimica Acta Part B: Atomic Spectroscopy
影响因子：
--
作者：
A. Murtazin;S. Groh;K. Niemax
通讯作者：
K. Niemax
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：
--
作者：
K. Niemax
通讯作者：
K. Niemax