Computer simulations of sample chambers for laser ablation–inductively coupled plasma spectrometry
作者： Davide Bleiner , Annemie Bogaerts
DOI: 10.1016/J.SAB.2007.02.010
关键词: Volume (thermodynamics) 、 Chemistry 、 Analytical chemistry 、 Volumetric flow rate 、 Mass spectrometry 、 Laser ablation 、 Particle number 、 Extraction (chemistry) 、 Helium 、 Inductively coupled plasma
摘要: Abstract The performance of several sample chambers was studied by means computational fluid dynamics. geometry and size found to influence the gas velocity pattern as well extraction efficiency. efficiency conventional ‘drum-shaped’ cells, in volume range 3 100 cm , between 5 15% (number particles), depending on operating conditions such flow rate, type carrier gas. Optimized designs permitted high factor six improved use helium transport speed reproducibility large cell. However, Ar showed better than He, especially for finer particles, due a shorter mean free path, which mitigated nano-particle slipping.
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