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http://dx.doi.org/10.5806/AST.2012.25.5.265

Development and spectroscopic characteristics of the high-power wave guide He Plasma  

Lee, Jong-Man (Department of Chemistry Education, Korea National University of Education)
Cho, Sung-Il (Division of Metrology for Quality of Life, Korea Research Institute of Standards and Science)
Woo, Jin-Chun (Division of Metrology for Quality of Life, Korea Research Institute of Standards and Science)
Pak, Yong-Nam (Department of Chemistry Education, Korea National University of Education)
Publication Information
Analytical Science and Technology / v.25, no.5, 2012 , pp. 265-272 More about this Journal
Abstract
Okamoto cavity was modified to generate high power (2.45 GHz, 2 kW) He, N2 and Ar plasmas with WR-340 waveguide. Many factors which influence to the plasma generation were optimized and investigated for the spectroscopic properties of the He plasma generated. Some of the important factors are the diameter of the inner conductor, the distance between the inner and outer conductors and the distance between the tip of the inner conductor and the torch. After optimization for the He, two torches (a commercial mini torch for ICP and a tangential flow torch made locally) were compared and showed similar results for the helium plasma gas flow of 25 L/min~30 L/min. A tall torch (extended) was used to block the air in-flow and reduced the background intensity at 340 nm region (NH band). Emission intensity was measured for determination of halogen element in the aqueous solution with power and carrier gas flow rate. Electron number density and the excitation temperature were on the order of $3.67{\times}10^{11}/cm^3$ and 4,350 K, respectively. These values are similar or a bit smaller than other microwave plasmas. It has been possible to analyze aqueous samples. The detection limit for Cl (479.45 nm) was obtained to be 116 mg/L and needs analytical optimization for the better performance.
Keywords
High power microwave plasma; MIP; Okamoto cavity; Helium plasma; WR-340 waveguide;
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1 C. I. M. Beenakker, B. Bosman and P. W. J. M. Boumans, Spectrochim. Acta, 33B, 373-381 (1978).
2 K. G. Michlewicz and J. W. Carnahan, Anal. Chem., 57, 1092-1095 (1985).   DOI
3 R. D. Deutsch and G. M. Hieftje, Appl. Spectrosc., 39, 214-222 (1985).   DOI   ScienceOn
4 M. Moisan, C. Beaudry and P. Leprince, IEEE transactions on Plasma Science, PS-3, 55-59 (1975).
5 M. Moisan, R. Pantel, J. Hubert, E. Bloyet, P. Leprince, J. Marec and A. Ricard, J. Microwave Power, 14, 57-61 (1979).   DOI
6 Q. Jin, C. Zhu, M. W. Borer and G. M. Hieftje, Spectrochim. Acta., 46B, 417-430 (1991).
7 Q. Jin, H. Zhang, J. Anal. At. Spectrom., 9, 851-856 (1994).   DOI
8 A. Besner and J. Hubert, Appl. Spectrosc., 52, 894-899 (1998).   DOI   ScienceOn
9 D. Boudreau and J. Hubert, Appl. Spectrosc., 47, 609-614 (1993).   DOI   ScienceOn
10 B. M. Spencer, B. W. Smith and J. D. Winefordner, Appl. Spectrosc., 48, 289-296 (1994).   DOI   ScienceOn
11 B. M. Spencer, A. R. Raghani, and J. D. Winefordner, Appl. Spectrosc., 48, 643-646 (1994).   DOI   ScienceOn
12 A. R. Hoskinson, J. Hopwood, N. W. Bostrom, J. A. Crank and C. Harrison, J. Anal. At. Spectrom., 26, 1258-65 (2011).   DOI   ScienceOn
13 K. Jankowski, A. Ramsza, E. Reszke and M. Strzelec, J. Anal. At. Spectrom., 25, 44-47 (2010).   DOI   ScienceOn
14 A. Tyburska and K. Jankowski, Analytical Methods, 3, 659-663 (2011).   DOI   ScienceOn
15 K. Jankowski, A. Jacowska, A. P. Ramsza and E. Reszke, J. Anal. At. Spectrom., 23, 1234-40 (2008).   DOI   ScienceOn
16 Y. Okamoto, Jpn. J. Appl. Phys., 38, L338-L341 (1999).   DOI
17 Y. Okamoto, M. Yasuda and S. Murayama, Jpn. J. Appl. Phys., 29, 670-672 (1990).   DOI
18 H. Yamada and Y. Okamoto, Appl. Spectrosc., 55, 114- 118 (2001).   DOI   ScienceOn
19 M. Ohata and N. Furuta, J. Anal. At. Spectrom., 12, 341-347 (1997).   DOI   ScienceOn
20 K. Ogura, H. Yamada, Y. Sato, and Y. Okamoto, Appl. Spectrosc., 51, 1496-1499 (1997).   DOI   ScienceOn
21 A. Matsumoto, A. Oheda and T. Nakahara, Anal. Sci., 17, 963-966. (2001).   DOI   ScienceOn
22 Y. Okamoto, H. Murohashi and S. Wake, Anal. Sci., 17, 967-970. (2001).
23 Z. Zhang and K. Wagatsuma, J. Anal. At. Spectrom., 17, 699-703 (2002).   DOI   ScienceOn
24 T. Maeda and K. Wagatsuma, Spectrochim. Acta., 60B, 81-87 (2005).   DOI   ScienceOn
25 K. B. Cull and J. W. Carnahan, Appl. Spectrosc., 42, 1061-1065 (1988).   DOI   ScienceOn
26 Mingin Wu and J. W. Carnahan, Appl. Spectrosc., 46, 163-168 (1992).   DOI
27 S. K. Chan, R. L. Van Hoven and A. Montaser, Anal. Chem., 58, 2342-2343 (1986).   DOI
28 M. T. C. De Loos-Vollerbregt, J. J. Tiggelman and L. De Galan, Spectrochim. Acta., 43B, 773-781 (1988).
29 D. J. Kalnicky, V. A. Fassel and R. N. Kniseley, Appl. Spectrosc., 31, 137-151 (1977).   DOI   ScienceOn