Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Notes
Optimum Observation Conditions of Emission Spectra from Laser Induced Plasmas Evaluated by Using a Two-Dimensionally Imaging Spectrograph
Chizuru KITAOKAKazuaki WAGATSUMA
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2008 Volume 24 Issue 6 Pages 785-789

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Abstract
A two-dimensionally imaging spectrometer system was employed to measure spatial variations in the intensities of emission lines in a Cu-Mn-Ni alloy sample when they were excited from a laser-induced plasma with krypton gas. The emission zone of these lines shrank and had greater emission intensities with increasing gas pressure, and the intensities of their background also became more intense. It was thus found that the optimum observation zone for the analytical application varied with the pressure of the plasma gas. The two-dimensional distribution of the signal-to-background ratio for each analytical line was investigated to determine the measuring conditions for the emission analysis, indicating that the spatially-resolved measurement was generally superior to the conventional spatially-integrated measurement over the plasma region.
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© 2008 by The Japan Society for Analytical Chemistry
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