Content of nitrates and nitrites in unprocessed raw beef

The aim of the study was to examine contents nitrates and nitrites in raw beef coming from cattle Polish Holstein-Friesian breed, black-and-white type, originating different parts Poland. research material comprised semitendinosus longissimus thoracis muscles obtained 176 heads cattle. content examined ranged 0.6 13.3 mg kg-1 rump 0.8 13.7 back. most samples were characterised by presence range 1 5 kg-1, least 11 14 kg-1. significantly higher, ranging 10.2 73.5 muscle 10.4 74.3 muscle. Such higher level contamination may be cause meat discolouration after heat treatment despite absence curing ingredients. It is necessary continuously monitor concentration materials, water feed ensure complete safety food animal origin.