We obtain high resolution spectra of nine red giant branch stars in NGC 6681 and perform the first detailed abundance analysis of stars in this cluster .
We confirm cluster membership for these stars based on consistent radial velocities of 214.5 \pm 3.7 km/s and find a mean [ Fe/H ] = -1.63 \pm 0.07 dex and [ \alpha /Fe ] = 0.42 \pm 0.11 dex .
Additionally , we confirm the existence of a Na-O anti-correlation in NGC 6681 and identify two populations of stars with unique abundance trends .
With the use of HST photometry from Sarajedini et al .
( 85 ) and Piotto et al .
( 76 ) we are able to identify these two populations as discrete sequences in the cluster CMD .
Although we can not confirm the nature of the polluter stars responsible for the abundance differences in these populations , these results do help put constraints on possible polluter candidates .