Inductively Coupled Plasma Cavity Ringdown Spectrometry

Abstract

Cavity ringdown spectrometry (CRS) differs from standard atomic absorption methods in that it is a measurement of the rate of light absorption by a sample within a closed optical cavity. The ringdown technique yields a very high sensitivity achieved from a combination of long effective sample pathlengths and relaxed accuracy constraints on the measurement of the decay rate of light in the cavity. While there has been rapid scientific recognition of the potential of cavity ringdown for molecular spectroscopy, there has been no systematic attempt to incorporate the advantages of CRS into an instrument for analytical atomic spectrometry. In this paper, the application of the cavity ringdown method to analytical atomic spectrometry is discussed. In particular, the first theoretical and experimental results concerning the use of CRS for trace analysis in an ICP are presented.

References

1. A. O'Keefe and D. A. G. Deacon, Rev. Sci. Instrum., 1988, 59, 2544.
2. D. Romanini and K. K. Lehmann, J. Chem. Phys., 1993, 99, 6287.
3. T. Yu and M. C. Lin, J. Am. Chem. Soc., 1993, 115, 4371.
4. G. Meijer, M. G. H. Boogaarts, R. T. Jongma, D. H. Parker and A. M. Wodtke, Chem. Phys. Lett., 1994, 217, 112.
5. R. T. Jongma, M. G. H. Boogaarts, I. Holleman and G. Meijer, Rev. Sci. Instrum., 1995, 66, 2821.
6. A. O'Keefe, J. J. Scherer, A. L. Cooksy, R. Sheeks, J. Heath and R. J. Saykally, Chem. Phys. Lett., 1990, 172, 214.
7. J. J. Scherer, J. B. Paul and R. J. Saykally, Chem. Phys. Lett., 1995, 242, 395.
8. J. J. Scherer, J. B. Paul, C. P. Collier and R. J. Saykally, J. Chem. Phys., 1995, 102, 5190.
9. P. Zalicki, Y. Ma, R. N. Zare, E. H. Wahl, J. R. Dadamio, T. G. Owano and C. H. Kruger, Chem. Phys. Lett., 1995, 234, 269.
10. J. J. Scherer, D. Voelkel, D. J. Rakestraw, J. B. Paul, C. P. Collier, R. J. Saykally and A. O'Keefe, Chem. Phys. Lett., 1995, 245, 273.
11. D. L. Huestis, R. A. Copeland, K. Knutsen, T. G. Slanger, R. T. Jongma, M. G. H. Boogaarts and G. Meijer, Can. J. Phys., 1994, 72, 1109.
12. R. T. Jongma, M. G. H. Boogaarts and G. Meijer, 1994, J. Mol. Spectrosc., 1994, 165, 303.
13. D. Romanini and K. K. Lehmann, J. Chem. Phys., 1995, 102, 633.
14. T. Yu and M. C. Lin, Int. J. Chem. Kinet., 1993, 25, 875.
15. T. Yu and M. C. Lin, J. Phys. Chem., 1994, 98, 9697.
16. D. J. Benard and B. K. Winker, J. Appl. Phys., 1991, 69, 2805.
17. M. G. H. Boogaarts and G. Meijer, J. Chem. Phys., 1995, 103, 5269.
18. Y. Huang, G. Jackson, H. S. Kim, S. Guan and A. G. Marshall, Phys. Scr., 1995, T59, 387.
19. Air Monitoring by Spectroscopic Techniques, ed. Sigrist, M. W., Wiley, New York, 1994.
20. P. Zalicki and R. N. Zare, J. Chem. Phys., 1995, 102, 2708.
21. J. Martin, B. A. Paldus, P. Zalicki, E. H. Wahl, T. G. Owano, J. S. Harris, Jr., C. H. Kruger and R. N. Zare, Chem. Phys. Lett., 1996, 258, 63.
22. K. K. Lehmann and D. Romanini, J. Chem. Phys., 1996, 105, 10263.
23. J. T. Hodges, J. P. Looney and R. D. van Zee, J. Chem. Phys., 1996, 105, 10278.
24. J. J. Scherer, J. B. Paul, A. O'Keefe and R. J. Saykally, Chem. Rev., 1997, 97(1), 25.
25. U.S. Department of Energy Announcement Number DE-R021-96MC33204, Washington, DC.
26. Inductively Coupled Plasmas in Analytical Atomic Spectrometry, ed. Montser, A., and Golightly, G. W., VCH, New York, 2nd edn., 1992, and references therein.
27. A. E. Siegman, Lasers, University Science Books, Mill Valley, CA, 1986.
28. P. W. J. M. Boumans and J. J. A. M. Vrakking, Spectrochim. Acta, Part B, 1986, 41, 1235.
29. A. A. Radzig and B. M. Smirnov, Reference Data on Atoms, Molecules, and Ions, Springer-Verlag, New York, 1985.
30. CRC Handbook of Chemistry and Physics, ed. Weast, R. C., and Astle, M. J., CRC Press, Boca Raton, FL, 1978.
31. D. P. Baldwin, D. S. Zamzow and A. P. D'Silva, J. Air & Waste Manage. Assoc., 1995, 45, 789.
32. A. Trivedi, S. Qian and D. L. Monts, Appl. Phys. B, in the press.
33. H. G. C. Human, N. Omenetto, P. Cavalli and G. Rossi, Spectrochim. Acta, Part B, 1984, 39, 1345.
34. S. W. Downey and N. S. Nogar, Appl. Spectrosc., 1984, 38, 876.
35. S. W. Downey and N. S. Nogar, Anal. Chem., 1985, 57, 13.
36. S. W. Downey, G. L. Keaton and N. S. Nogar, Spectrochim. Acta, Part B, 1985, 40, 927.
37. J. T. Hodges, J. P. Looney and R. D. van Zee, Appl. Opt., 1996, 35, 4112.
38. R. Engeln, G. von Helden, G. Berden and G. Meijer, Chem. Phys. Lett., 1996, 262, 105.
39. D. Romanini, A. A. Kachanov, N. Sadeghi and F. Stoeckel, Chem. Phys. Lett., 1997, 264, 316.