Conclusions
It can be concluded from the results that protein concentrates
are the main risk factor of food chain contamination
with melamine and cyanuric acid, especially those of
unknown origin or imported from countries outside the
EU. Feed with a high content of nitrogen compounds and
a low content of aminoacids can be regarded as particularly
suspicious. Comparison of test results to determine
nitrogen compounds and amines can be used as proof of
adulteration of protein feeds. These feeds must be subjected
to further analysis to determine the presence of melamine
and cyanuric acid