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We use a modified version of MOOG to generate large grids of syntheticspectra in an attempt to derive quantitative abundances for three CVs (GK Per,RU Peg, and SS Cyg) by comparing the models to moderate resolution (R $\sim$25,000) $K$-band spectra obtained with NIRSPEC on Keck. For each of the threesystems we find solar, or slightly sub-solar values for [Fe/H], but significantdeficits of carbon: for SS Cyg we find [C/Fe] = $-$0.50, for RU Peg [C/Fe] =$-$0.75, and for GK Per [C/Fe] = $-$1.00. We show that it is possible to uselower resolution (R $\sim$ 2,000) spectra to quantify carbon deficits. Weexamine realistic veiling scenarios and find that emission from H I or COcannot reproduce the observations.

Quantifying the Carbon Abundances in the Secondary Stars of SS Cygni, RU Pegasi, and GK Persei