A method for measurement of the flow velocity of calcium in inductively coupled plasma mass spectrometer (ICP-MS) was established based on the atomic emission spectrometry technique of analytical particles in plasma. The difference for the flow velocity of analytical particles in inductively coupled plasma mass spectrometer and emission spectrometer was compared. The results showed that the atomic emission spectra obtained in two sampling points were basically consistent and the signal for the latter was weaker. Therefore, it was verified that they were from the aerogel of the same analyte. As a results, it indicated that the flow velocity of analytical particles in high temperature plasma was measured effectively by recording the fluorescence signals for the two sampling points and the corresponding flow time. The vacuum pressure after sampling cone of ICP-MS had obvious accelerating effect on the analytical particles in plasma, especially the area with distance of 0~3 mm before the sampling cone. The experimental results could provide data support to improve the sampling interface transfer efficiency design for ICP-MS. Meanwhile, this equipment could also provide a feasible method to measure the flow velocity of particles in high temperature environment.
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