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We present preliminary results obtained from the analysis of very deepechelle spectra of a dozen planetary nebulae with [WC] or weak emission lines(wels) central stars. The computed abundance discrepancy factors (ADFs) aremoderate, with values lower than 4. In principle, no evidence of the H-poormetal enriched inclusions proposed by Liu et al. (2000) have been found.However, a detailed analysis of the data is in progress.

Abundances and ADFs in PNe with WC central stars