鲫鱼、鲢鱼和乌鱼的元素分布分析

为了解鲫鱼、鲢鱼和乌鱼的元素分布情况，将其可食部位中污染元素和矿物质元素分别进行测定。结果表明，各种元素在鱼的可食部位蓄积量存在明显的差异。鲫鱼内膜的铝（Al）、铬（Cr）、砷（As）、镉（Cd）、铅（Pb）含量显著高于鲫鱼的其他可食部位（P＜0.05），而鲫鱼鱼头的钙（Ca）、磷（P）、镁（Mg）含量显著高于鲫鱼的其他可食部位（P＜0.05）；鲢鱼内膜的Cr、As、Cd含量显著高于鲢鱼的其他可食部位（P＜0.05），总As含量（1.81 mg/kg）也显著高于鲫鱼和乌鱼的各个可食部位（P＜0.05），而鲢鱼鱼头的Ca、P、Mg、Fe含量显著高于鲢鱼的其他可食部位（P＜0.05）；乌鱼鱼头富集Cd很严重，在这3种鱼的可食部位中其含量（0.006 14 mg/kg）是最高的，但乌鱼鱼头同时也富含Mg、Fe、铜（Cu）、Ca、P等营养元素。

Element distribution analysis of crucian carp,silver carp and snakehead

Contaminated elements and mineral elements in edible parts were determined respectively to understand the distribution of elements in crucian carp, silver carp and snakehead. The results showed that there were significant differences in the accumulation of elements in the edible parts of fish. The Al, Cr, As, Cd and Pb contents in the intima of crucian carp were significantly higher than those in other edible parts of crucian carp (P＜0.05), but the Ca, P and Mg contents in the head of crucian carp were much higher than those in other edible parts of crucian carp (P＜0.05). The Cr, As and Cd contents in the intima of silver carp were significantly higher than those of other edible parts of silver carp (P＜0.05), and the total content of As (1.81 mg/kg) in silver carp was also significantly higher than those of other edible parts of crucian carp and snakehead (P＜0.05), while the Ca, P, Mg and Fe contents in the head of silver carp were significantly higher than those of other edible parts of silver carp (P＜0.05). The enrichment of Cd in the head of snakehead was very serious. Among the edible parts of the three species of fish, the Cd content (0.006 14 mg/kg) in the head of snakehead was the highest, while the Mg, Fe, Cu, Ca and P content in the head of snakehead was also rich.