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According to previous spectral analyses of Wolf-Rayet type central stars,late [WC] subtypes show systematically higher carbon-to-helium abundance ratiosthan early [WC] subtypes. If this were true, it would rule out that these starsform an evolutionary sequence. However, due to the different parameter domainsand diagnostic lines, one might suspect systematic errors being the source ofthis discrepancy. In an ongoing project we are therefore checking the [WC]analyses by means of the last generation of non-LTE models for expandingstellar atmospheres which account for line-blanketing and wind clumping. Sofar, the abundance discrepancy is not resolved. Further element abundances (H,N, Fe) are determined and compared with evolutionary predictions.

Revised element abundances for WC-type central stars