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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Autónoma de Baja California
2004
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48030207 |
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Table of Contents:
- A technique for the separation of the most recently deposited nacreous layer in Mytilus californianus shells for trace metal analysis L. E. Rivero M. L. Lares Ciencias de la Tierra shell cadmium nacreous layer Mytilus californianus A new method to separate a section of the most recently deposited nacreous layer from the rest of the shell of Mytiluscalifornianus was developed. Techniques described for other mussel species proved unsuitable for this species. In this newmethod, the shells are soaked in 30% hydrogen peroxide for 1015 min at 8085ºC to eliminate the periostracum, a potentialsource of trace metal contamination. Next, the shells are heated in a muffle furnace at 350ºC for 1 h to separate the nacreous layerfrom the calcite layer. Finally, the nacreous band is easily separated from the rest of the shell by gently tapping it with a stainlesssteel needle. This is a simple and fast method that is proposed for trace metal monitoring purposes using M. californianus shells.To illustrate the application of the method, results from an experiment performed in our laboratory, in which mussels wereexposed to two different Cd concentrations for 60 days and their shells processed by this technique, are included. The mostrecently deposited nacreous layer showed significant increases in Cd concentrations, which were proportional to the exposedambient concentrations. 2004 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48030207 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.30