A Comparative Study of Xanthans by Light Scattering

  • E. A. Lange


Xanthan samples from four commercial manufacturers were studied in synthetic reservoir brines and a dilute NaCl solution. The samples included broth and powdered xanthan products. The weight-average molecular weight, Mw, for each sample was measured in the different solvents by low angle light scattering. Mw was not affected by the brine composition, and no evidence for increased aggregation in high-salinity, high-hardness brines was found. Mw varied from 4 × 106 g/mol to 12 × 106 g/mol. Variations in molecular weight were also observed among samples from one manufacturer. The translational diffusion coefficients of the xanthans could not be measured by a dynamic light scattering technique. Other modes of motion in addition to translational diffusion may have been detected at the 40° scattering angle as a direct result of the high polymer molecular weights.


Apparent Diffusion Coefficient Virial Coefficient Translational Diffusion Scattered Light Intensity Translational Diffusion Coefficient 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Jansson, P. E., Kenne, L., and Lindberg, B., Carbohydr. Res., 45, 275–282 (1975).CrossRefGoogle Scholar
  2. 2.
    Holzwarth, G., and Prestridge, E. G., Science, 197, 757–759 (1977).CrossRefGoogle Scholar
  3. 3.
    Milas, M. and Rinaudo, M., Polym. Bull., 12, 507–514 (1984).CrossRefGoogle Scholar
  4. 4.
    Seeger, B., Die Nahrung, 25 (7), 655–666 (1981).CrossRefGoogle Scholar
  5. 5.
    Southwick, J. G., Jamieson, A. M., and Blackwell, J., Carbohydr. Res., 99 117–127 (1982).CrossRefGoogle Scholar
  6. 6.
    In retrospect, this procedure of dispersing the powdered Xanthan D in distilled water may have affected the Mw compared to direct dispersal into brine.Google Scholar
  7. 7.
    Dubois, M., Gilles, K. A., Hamilton, J. K., Rebers, P. A., and Smith, F., Anal. Chem., 28, 350–356 (1956).CrossRefGoogle Scholar
  8. 8.
    Tanford, C., “Physical Chemistry of Macromolecules”, Wiley, New York (1961).Google Scholar
  9. 9.
    Chauveteau, G, Kohler, N., Soc. Pet. Eng. J., 361–368, June 1984.Google Scholar
  10. 10.
    Ford Jr., N. C., in “Dynamic Light Scattering”, Pecora, R., Ed., Plenum, New York (1985) pp. 7–57 andGoogle Scholar
  11. Weiner, B., in “Modern Methods of Particle Size Distribution Analysis”, Barth, H., Ed., Wiley, New York (1984) pp. 93–116.Google Scholar
  12. 11.
    Koppel, D. E., J. Chem. Phys., 57, 4814–4820 (1972).CrossRefGoogle Scholar
  13. 12.
    Sato, T., Norisuye, T., and Fujita, H., Polym. J., 16, 341–350 (1984).CrossRefGoogle Scholar
  14. 13.
    Müller, G., Lecourtier, J., Chauveteau, G., and Allain, C., Macromol. Chem. Rapid Commun., 5, 203–208 (1984).CrossRefGoogle Scholar
  15. 14.
    Müller, G., Anrhourrache, M., Lecourtier, J., and Chauveteau, G., Int. J. Biol. Macromol., 8, 167–172 (1986).CrossRefGoogle Scholar
  16. 15.
    Holzwarth, G. Dev. Ind. Microbiol., 26, 271–280 (1985).Google Scholar
  17. 16.
    Sato, T., Kojima, S., Norisuye, T., and Fujita, H., Polym. J. 16, 423–429 (1984).CrossRefGoogle Scholar
  18. 17.
    Lecourtier, J., Chauveteau, G., and Müller, G., Int. J. Biol. Macromol., 8, 306–310 (1986)CrossRefGoogle Scholar
  19. 18.
    Pecora, R., in “Scattering Techniques Applied to Supramolecular and Nonequilibrium Systems”, Chen, S. H., Chu, B., and Nossal, R., Ed., Plenum, New York (1980) pp. 161–172.Google Scholar

Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • E. A. Lange
    • 1
  1. 1.Exxon Production Research CompanyHoustonUSA

Personalised recommendations