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Sodium metatungstate: a new heavy-mineral separation medium for the extraction of conodonts from insoluble residues

Published online by Cambridge University Press:  19 May 2016

Stanley T. Krukowski
Stanley T. Krukowski*
Affiliation:
Department of Geoscience, New Mexico Institute of Mining and Technology, Socorro 87801
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Extract

Sodium metatungstate (SMT), 3Na2WO4 · 9WO3 · H2O, is a nontoxic (Sax, 1979), high-density (1.00-3.10 g/cm3) separating compound which results in nearly neutral (pH 6) solutions of relatively low viscosity. It was presented as a medium for density gradient centrifugation by Plewinsky and Kamp (1984). Since then, investigators have used SMT (or sodium polytungstate) as a high-density medium for routine mineral separations, for recovery of conodonts from insoluble residues, for separation of various feldspar species from one another, and for segregation of inorganic mineral fractions (ash) from coal.

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 62 , Issue 2 , March 1988 , pp. 314 - 316
Copyright
Copyright © The Paleontological Society 

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References

Allman, M., and Lawrence, D. F. 1972. Geological Laboratory Techniques. Arco Publishing Company, Inc., New York, 335 p.Google Scholar
Barnes, C. R., and O'Brien, F. H. C. 1987. Coffee and conodonts: cheap filtration, p. 67. In Austin, R. L. (ed.), Conodonts: Investigative Techniques and Applications. Ellis Horwood Limited, Chichester, England.Google Scholar
Brem, H., Stein, A. B., and Rosenkranz, H. S. 1974. The mutagenicity and DNA-modifying effect of haloalkanes. Cancer Research, 34:2576–2579.Google ScholarPubMed
Collinson, C. 1963. Collection and preparation of conodonts through mass production techniques. Illinois State Geological Survey Circular 343, 16 p.Google Scholar
Ellison, S. P. Jr. 1944. The composition of conodonts. Journal of Paleontology, 18:133–140.Google Scholar
Freeman, E. F. 1982. Fossil bone recovery from sediment residues by the “interfacial method.” Palaeontology, 25:471–484.Google Scholar
Hauff, P. L., and Airey, J. 1980. The handling, hazards, and maintenance of heavy liquids in the geologic laboratory. U.S. Geological Survey Circular 827, 24 p.Google Scholar
Kazantzis, G. 1979. Tungsten, p. 637–646. In Friberg, L., Nordberg, G. F., and Vouk, V. B. (eds.), Handbook on the Toxicity of Metals. Elsevier, New York.Google Scholar
Merrill, G. K. 1985. Interfacial alternatives to the use of dangerous heavy liquids in micropaleontology. Journal of Paleontology, 59:479–481.Google Scholar
Merrill, G. K. 1987. Cryogenic density separation of conodonts, p. 63–66. In Austin, R. L. (ed.), Conodonts: Investigative Techniques and Applications. Ellis Horwood Limited, Chichester, England.Google Scholar
Plewinsky, B., and Kamp, R. 1984. Sodium metatungstate, a new medium for binary and ternary density gradient centrifugation. Makromolekulare Chemie, 185:1429–1439.Google Scholar
Sax, N. I. 1979. Dangerous Properties of Industrial Materials, 5th ed. Van Nostrand Reinhold Co., New York, 1118 p.Google Scholar
Van Haaften, A. B. 1969. Acute tetrabromoethane (acetylene tetrabromide) intoxication in man. American Industrial Hygiene Association Journal, 30:251–256.Google Scholar