Use of micronucleic test for the determination of genotoxicity of waste liquor from a magnesium bisulfite pulp mill.

Since diluted magnesium bisulfite waste liquor from a pulp mill after beech wood processing exhibited an inhibitory effect on all the model organisms used in our previous work (Cernáková et al. 1991) and the results of Ames mutagenicity test were ambiguous, micronucleic test was used for characterization. The frequency of micronuclei observed suggested that the diluted magnesium bisulfite waste liquor had a mutagenic effect under in vitro conditions of the micronucleic test.