摘要
为了解龙头鱼的甲醛来源，分别从市场、刚靠岸的渔船及确实未加甲醛的张网或丝网渔获物中获取龙头鱼样品，用水蒸汽蒸馏-乙酰丙酮分光光度法测定甲醛。结果发现，龙头鱼死亡后肌体自身能产生大量的甲醛，其含量随鱼体鲜度的下降而升高，但当鱼体高度腐败时急剧下降。鱼体死亡后低温保存3-4d，甲醛含量可高达200mg／kg以上。于-20℃保存180d，甲醛含量可达500mg／kg以上。市售干制的龙头鱼不论成品还是淡品，甲醛值高达871.3～1357.2mg／kg。张网获取的样品不去内脏整尾阴干晾晒，甲醛值可高达2000mg／kg。本试验结果提示。进行龙头鱼甲醛监督检查时，应慎下结论。
Aimed at finding out the source of formaldehyde in Harpadon nehereus, formaldehyde in fish from supermarket, hook or netting cerified without formaldehyde addition was detected by acetyl acetone colorimetric method. The results showed that a great deal of formaldehyde was produced by the body of dead Harpadon nehereus itself, With the freshness of the fish dropping, the content of formaldehyde in Harpadon nehereus increased. The content, however, decreased when the fish body was badly decomposed. Following the preservation at low temperature for 3- 4 days and at -20 ℃ for 180 days, the content of formaldehyde rose up to 200 mg/kg and 500 mg/kg respectively. The content of formaldehyde in dried Harpadon nehereus （fresh or salted） from supermarket ranged from 871.3 to 1 357.2 mg/kg, Formaldehyde contents in fish by swing net wholly dried in the shade and dried by sunshine with viscera removed were 2 000 mg/kg and 97,7 mg/kg respectively. The research revealed that the content of formaldehyde in Harpadon nehereus from market was enormous and it was the product of postmortem change rather than the result of deliberate addition.
出处
《中国食品卫生杂志》
2006年第5期441-443,共3页
Chinese Journal of Food Hygiene
关键词
鱼
甲醛
卫生调查
Fishes
Formaldehyde
Health Surveys
