Ocena stopnia swiezosci i przydatnosci spozywczej ryb i przetworow rybnych na podstawie zawartosci histaminy i trimetyloaminy

Oznaczono zawartość histaminy i trimetyloaminy w 3-ch gatunkach ryb morskich i w 15 rodzajach przetworów rybnych. Wykazano ilościowe i jakościowe różnice w zawartości amin zależnie od stopnia świeżości i gatunku analizowanych ryb.

The results of histamine and trimethylamine determination in three fish species (cod, herring, scomber) of various freshness are presented. In fresh fish the histamine contents were s follow: cod 0,00; scomber 1,00; and herring 0,50 mg/100 g. During storage time at room temperature (+18°C), the value of the freshness indicators increased after 24 and 48 hours of storage. The highest increase was observed in scomber (21,30 and 34,00 mg/100 g), the lowest in cod (2,00 and 4,00 mg/100g). The trimethylamine value increased in different order than the histamine in the fish species. The highest ТМЛ amount was observed in cod flesh - the lowest in scomber. According to these findings the freshness of some ready fish products was determined. The histamine level never exceeded 6 mg/100 g, always beeing below the „safety level" (=10 mg/100g). The value of TMA never exceeded the limits considered for fresh fish products - 15 mg N per 100 mg sample.