Zur Kontamination von Wein durch chlorierte Kohlenwasserstoffe

In more than 30% of the investigated samples of wine we found residues of the halogenated hydrocarbons chloroforme (max 56 μg/l) and trichlorethene (max 124 μg/l). The analytical methods we used were headspace-GC (ECD) and headspace-GC-MS (SIM). Partially high concentrations of trichlorethene were determined in some french wine. The reason of this contamination could not be found until now. The contamination of the higher amounts of chloroforme is obviously caused by the presence of haloformes during the cross flow filtration. According to our experience a migration of small amounts of chloroforme from cork is possible as well. In the meanwhile a 100 μg/l maximum residue level for each chloroforme, trichlorethene and tetrachlorethene in wine has been established (200 μg/l for the sum) 5 ).