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The optimal acetate buffered acetic acid technique for extracting phosphatic fossils

Published online by Cambridge University Press:  14 July 2015

Lennart Jeppsson ,
Rikard Anehus  and
Doris Fredholm
Lennart Jeppsson
Affiliation:
Department of Geology, Sölvegatan 13, SE-223 62 Lund, Sweden, Fax: +46-46 12 14 77
Rikard Anehus
Affiliation:
Department of Geology, Sölvegatan 13, SE-223 62 Lund, Sweden, Fax: +46-46 12 14 77
Doris Fredholm
Affiliation:
Department of Geology, Sölvegatan 13, SE-223 62 Lund, Sweden, Fax: +46-46 12 14 77
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Abstract

When extracting or cleaning phosphatic fossils using acetic acid, the solutions must be buffered with calcium acetate to a pH greater than 3.6 for conodont and many fish taxa, and to a slightly greater pH for some conulariid, shark, and some fish taxa. Diagrams of the changes in pH and density during dissolution, rate of dissolution, and productivity per liter of acid provide a means for selecting the economically optimal process, monitoring the progress, and adjusting the composition of the solution when necessary.

Type
Research Article
Information
Journal of Paleontology , Volume 73 , Issue 5 , September 1999 , pp. 964 - 972
Copyright
Copyright © The Paleontological Society 

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