Direct and simultaneous determination of molybdenum and vanadium in sea-water using a multielement electrothermal atomic absorption spectrometer

Abstract

Direct and simultaneous determinations of Mo and V in sea-water using a multi-element electrothermal atomic absorption spectrometer (Perkin-Elmer SIMAA 6000) are described. Three kinds of chemical modifier [Mg(NO₃)₂ , Pd(NO₃)₂ and a mixture of both] were tested. A simple calibration curve method could be used to determine Mo in sea-water using Pd or a mixture of Pd and Mg as the chemical modifier. A standard additions method was used to determine V and to determine Mo and V simultaneously in sea-water. The detection limits were 0.35–0.60 µg l^–1 for Mo. The detection limit for V in this work (0.32–0.51 µg l^–1) is much lower than those reported in the literature (18–50 µg l^–1), such that direct determination of V in unpolluted sea-water (<2 µg l^–1) by ETAAS is possible. The RSDs for the simultaneous determination of Mo and V in nearshore or open ocean sea-water are ≤11% using a mixture of Pd and Mg as the chemical modifier. The accuracy of the method for Mo determination was confirmed by the analysis of two kinds of certified reference sea-water. There is no certified value of V provided for these reference sea-water samples. The experimentally determined of V concentrations were compared with values reported in the literature.

References

1. S. D. Huang and K. Y. Shih, Spectrochim. Acta, Part B, 1993, 48, 1451.
2. R. E. Sturgeon, S. S. Berman, A. Desaulniers and D. S. Russell, Anal. Chem., 1979, 51, 2364.
3. Z. Grobenski, R. Lehmann, B. Radziuk and U. Voellkopf, At. Spectrosc., 1984, 5, 87.
4. S. D. Huang, W. R. Lai and K. Y. Shih, Spectrochim. Acta, Part B, 1995, 50, 1237.
5. W. Slavin, G. R. Carnrick and D. C. Manning, Anal. Chem., 1982, 54, 621.
6. W. Slavin, D. C. Manning, G. R. Carnrick and E. Pruszkowska, Spectrochim. Acta, Part B, 1983, 38, 1157.
7. C.-R. Lan and Z. B. Alfassi, Analyst, 1994, 119, 1033.
8. C.-R. Lan, Analyst, 1993, 118, 189.
9. R. Guevremont, R. E. Sturgeon and S. S. Berman, Anal. Chim. Acta, 1980, 115, 163.
10. R. Guevremont, Anal. Chem., 1980, 52, 1574.
11. E. J. Czobik and J. P. Matousek, Anal. Chem., 1978, 50, 3.
12. E. Pruszkowaska, G. R. Carnrick and W. Slavin, Anal. Chem., 1983, 55, 182.
13. H. Chang and S. D. Huang, Spectrochim. Acta, 1994, 49, 283.
14. J. Y. Cabon and A. Le Bihan, J. Anal. At. Spectrom., 1992, 7, 383.
15. J. Y. Cabon and A. Le Bihan, J. Anal. At. Spectrom., 1994, 9, 477.
16. J. Y. Cabon and A. Le Bihan, Spectrochim. Acta, Part B, 1995, 50, 1703.
17. J. Y. Cabon and A. Le Bihan, Spectrochim. Acta, Part B, 1996, 51, 1245.
18. D. J. Hydes, Anal. Chem., 1980, 52, 959.
19. R. E. Sturgeon, S. S. Berman, J. A. H. Desaulniers, A. P. Mykytiuk, J. W. McLaren and D. S. Russell, Anal. Chem., 1980, 52, 1585.
20. R. Guevremont, Anal. Chem., 1981, 53, 911.
21. S. Sachsenberg, T. Klenke, W. E. Krumbein, H. J. Schellnhuber and E. Zeek, Anal. Chim. Acta, 1993, 279, 241.
22. B. Welz, G. Schlemmer and J. R. Mudakavi, Anal. Chem., 1988, 60, 2567.
23. S. D. Huang and K. Y. Shin, Spectrochim. Acta, Part B, 1995, 50, 837.
24. D. L. Tsalev, V. I. Slaveykova and P. B. Mandjukov, Spectrochim. Acta Rev., 1990, 13, 225.
25. G. Schlemmer and B. Welz, Spectrochim. Acta, Part B, 1986, 41, 1157.
26. T. Akagi, K. Fuwa and H. Haraguchi, Anal. Chim. Acta, 1985, 177, 139.
27. K.-L. Yang, S.-J. Jiang and T. J. Hwang, J. Anal. At. Spectrom., 1996, 11, 139.
28. G. Chapple and J. P. Byrne, J. Anal. At. Spectrom., 1996, 11, 549.
29. A. Prange and A. Knochel, Anal. Chim. Acta, 1985, 172, 79.
30. C. Colombo and C. M. G. van den Berg, Anal. Chim. Acta, 1997, 337, 29.
31. M. Berglund, W. Frech, D. C. Baxter and B. Radizink, Spectrochim. Acta, Part B, 1993, 48, 1381.
32. J. G. Sen Gupta and J. L. Bouiver, Talanta, 1995, 42, 269.
33. H. Edel, L. Quick and K. Cammann, Anal. Chim. Acta, 1995, 310, 181.
34. B. S. Iversen, A. Panayi, J. P. Camblor and E. Sabbioni, J. Anal. At. Spectrom., 1996, 11, 591.
35. Y. I. Lee, M. V. Smith, S. Indurthy, A. Deval and J. Sneddon, Spectrochim. Acta, Part B, 1996, 51, 109.
36. V. Gottelet, G. Henrion, R. Kalahne and M. Stoyke, Nahrung Food, 1996, 40, 313.
37. T. Nakahara and C. L. Chakrabarti, Anal. Chim. Acta, 1979, 104, 99.
38. M. Tominaga and K. Bansho, Anal. Chim. Acta, 1985, 169, 171.
39. D. A. Segar and J. G. Gonzalez, Anal. Chim. Acta, 1972, 58, 7.
40. D. A. Segar, Intern. J. Environ. Anal. Chem., 1973, 3, 107.
41. P. G. Su and S. D. Huang, Spectrochim. Acta, Part B, in the press.
42. B. Welz, G. Schlemmer and J. R. Mudakavi, J. Anal. At. Spectrom., 1988, 3, 695.
43. R. E. Sturgeon, S. S. Berman, A. Desaulniers and D. S. Russell, Talanta, 1980, 27, 85.