  We present a measurement of metallicity in the Galactic center Quintuplet
Cluster made using quantitative spectral analysis of two Luminous Blue
Variables (LBVs). The analysis employs line-blanketed NLTE wind/atmosphere
models fit to high-resolution near-infrared spectra containing lines of H, HeI,
SiII, MgII, and FeII. We are able to break the H/He ratio vs. mass-loss rate
degeneracy found in other LBVs and to obtain robust estimates of the He content
of both objects. Our results indicate solar iron abundance and roughly twice
solar abundance in the alpha-elements. These results are discussed within the
framework of recent measurements of oxygen and carbon composition in the nearby
Arches Cluster and iron abundances in red giants and supergiants within the
central 30 pc of the Galaxy. The relatively large enrichment of alpha-elements
with respect to iron is consistent with a history of more nucleosynthesis in
high mass stars than the Galactic disk.
