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Research on the development of natural formaldehyde on some kinds of seawater fish during storage in crushed ice has been done to know the intencity of formaldehyde produced naturally by the fish after death. This research was carried out on live marine fish consisting of 6 species i.e. star pomfret (Trachinotus blochii), barramundi (Lates calcarifer, bloch.), cobia (Rachycentron canadum), milk fish (Chanos chanos), grouper (Epinephelus fuscoguttatus-lanceolatus), and red snapper/jenaha (Lutjanus johnii). Field sampling is done in different occasions and at each occasion two kinds of fish were sampled. The live fish were brought to the Research and Development Center for Marine and Fisheries Product Processing and Biotechnology (BBP4BKP) laboratory, then the fish were killed by hypothermal method (put in ice water at 0–4 o C for 30 minutes). Then the fish were divided into 3 groups and stored in a coolbox filled with ice with the ratio fish and ice of 1 : 3. Observations were made every 3 days for 18 days. The parameter analyzed were formaldehyde, trimethilamine (TMA), trimethilamine oxide (TMAO), and total volatile base (TVB) content while proximate composition was assessed at the first day. Result of the experiment showed that the content of natural formaldehyde on day 12 of star pompfret, barramundi, cobia, milk fish, red snapper and grouper were 0.954; 1.572; 0.964; 0,715; 1.381; 1.303 ppm, respectively. At that time the fish was still fresh with TVB content of below 20 mgN% (except cobia which was 28,94 mgN%). The TMA content ranged between 6,09– 11,81 mgN% and the TMAO ranged at 3.22–11,3 mgN% and tended to increase during storage.

Pembentukan Formaldehid Alami pada Beberapa Jenis Ikan Laut selama Penyimpanan dalam Es Curai