In these proceedings we present initial results of a spectroscopic analysis of a small sample of evolved K-giants in the globular cluster 47 Tucanae .
We derive the effective temperature , surface gravity and microturbulence of all targets using standard methods .
Further we derive LTE abundances of [ Fe/H ] and [ O/Fe ] as well as the abundance of sodium , using NLTE corrections .
We find a mean metallicity for the cluster of [ Fe/H ] = -0.75 \pm 0.10 , in excellent agreement with several other studies .
Also , we confirm the sodium-oxygen anticorrelation previously reported by a number of other authors .
Finally , we see indications of the sodium enriched stars also being enriched in heavy magnesium isotopes .