養殖魚類和水產飼料中之人工合成抗氧化劑殘留量   全文下載

Level of Synthetic Antioxidant in Cultured Fish and Fish Feed

為知台灣養殖魚蝦類、市販水產飼料和魚粉中之人工合成抗氧化劑殘留量和脂質品質，乃自市場採集6種養殖魚蝦類共68個檢體，7種不同魚種之水產飼料共37個檢體，以及6種不同國家產之魚粉共33個檢體，經以高性能液相層析法分析人工合成抗氧化劑含量，得知任一種檢體中之殘留量，皆以BHT為主。BHT在魚蝦類肝臟或肝胰臟中之含量為0 - 59.8 ppm，在魚粉中之含量則為0 - 150.0 ppm，顯BHT在養殖魚蝦體、水產飼料和魚粉中均尚低於法定界限濃度200 ppm。另外，水產飼料中脂質之過氧化物價經檢測得知為0.2 - 60.8 meq／kg，TBA值為6.4 - 45.6 mg／kg，酸價則為7.8 - 66.6 mg／g；魚粉中脂質之過氧化物價為5.6 - 85.6 meq／kg，TBA值為4.6 - 88.6 mg／kg；酸價則為6.2 - 70.1 mg／g，顯示水產飼料和魚粉中之脂質品質差異甚大，且均有遭受氧化。

Attempts were made to determine the level of synthetic antioxidants and lipid quality in fish feeds and in cultured fish in Taiwan. Sixty - eight samples of six fish species, thirty - seven feed samples for seven fish species and thirty- three samples of fish meal from six countries were collected from markets and/or from manufacturers, and analyzed. It was found that BHT (dibutylated hydroxytoluene) was the major antioxidant in cultured fish, fishery feed and fish meal. BHT level ranged 0- 12.3 ppm, 0- 59.8 ppm and 0- 150.0 ppm in fish liver (or shrimp hepatopancreas), feed and fish meal, respectively. There was no residue of antioxidant in fish muscle. The lipid quality of fish feed was as follows : peroxide value (POV) 0.2- 60.8 meq/kg, thiobarbituric acid (TBA) value 6.4 - 45.6 mg/kg and acid value (AV) 9.8- 66.6 mg/g; and for fish meal POV was 5.6- 85.6 meq/kg, TBA value 4.6 - 88.6 mg/kg and AV 6.2- 70.1 mg/g. There is no safety concern on the synthetic antioxidant residue in cultured fish, fish feed and fish meal. However, the lipid quality in fish feed and fish meal should be improved.