Mercury, chromium, lead and organochlorine pesticide residues in some food products of animal origin: A review.

The authors present the results of several years' work in the field of food pollution. The research, which has been carried out on food products of animal origin marketed in the north of Italy, has established that the degree of contamination by heavy metals (mercury, chromium and lead) and organochlorine pesticides is generally lower than the tolerances suggested by the World Health Organisation.