High S/N , high resolution CCD spectra of 10 Am binaries with different orbital elements, rotation and atmospheric parameters obtained with the 2-m telescope of NAO Rozhen (Bulgaria) were analyzed. We carried out preliminary abundance analyses of these stars and studied the possible dependences of abundance anomalies and [Ca/Fe] on their values of effective temperature, v sin i, orbital period, and eccentricity. There are weak trends of [Ca/Fe] increasing with v sin i and decreasing with

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... icity and orbital period. [Ca] seems to be increasing with effective temperature, and [Fe] decreasing with v sin i and increasing with eccentricity. However we need to study more stars to confirm and disentangle the possible trends.