The present work deals with the study of the microdistribution of copper, chrome and arsenic elements in Eucalyptus globulus Labill. sapwood, treated with a CCA water-borne preservative by full-cell process, with the help of scanning electron microscopy together with energy dispersion X-ray analysis technique. The work shows that the retention of CCA elements is high in vessels and vasicentric parenchyma as well as in the wood rays, whereas it is quite low in fibres. There are also some differences between retention obtained in the two levels of depth of radial penetration considered, increasing or constant rate of variation with depth having been found. Conclusion reached point to the need of obtaining high enough salt retention in sapwood in order to avoid this irregularity of microdistribution of CCA preservatives in Eucalyptus globulus round wood and ensure adequate durability.

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