华南地区近江牡蛎营养成分分析及评价

本文分析和评价了华南沿海10个地区近江牡蛎的营养成分,并讨论了内脏团对近江牡蛎营养成分的影响。结果显示:调查地区近江牡蛎的水分、粗蛋白、脂肪和灰分质量分数分别为84.90%、7.64%、0.75%和1.71%;10个地区近江牡蛎均检测出16种氨基酸,其中7种为必需氨基酸,总氨基酸含量为3.97~7.60 g/100 g,必需氨基酸占总氨基酸(EAA/TAA)的比率在33.86%~38.06%之间,蛋氨酸为第一限制氨基酸,风味氨基酸占氨基酸总量38.42%~43.25%;钙、铁、锌、硒等微量元素丰富。近江牡蛎去除内脏团后蛋白质含量较牡蛎整体蛋白质含量略高,脂肪含量略低;总氨基酸平均含量为5.83 g/100 g,略有升高,必需氨基酸占总氨基酸的35.59%,风味氨基酸占总氨基酸的41.16%,钙、铁、锌、硒微量元素含量与近江牡蛎整体含量相近,其中锌含量较牡蛎整体略高。因此,近江牡蛎是一种有较高营养价值的水产品,除去内脏团后的近江牡蛎营养价值略有升高,建议消费者除去内脏后食用,对保障消费者安全具有重要的意义。

Analysis and evaluation of nutrient composition in Ostrea rivularis from south China sea coast

The present study analyzed and evaluated the nutrient components in Ostrea rivularis from south China sea coast,and discussed the effect of visceral mass on the nutrient components.The results showed that the contents of water,crude protein,fat and ash in the Ostrea rivularis were 84.90%,7.64%,0.75% and 1.71%,respectively.Sixteen amino acids were found which contained seven essential amino acids in the range of 3.97 g/100 g to 7.60 g/100 g,the ratio of EAA/TAA was in range of 33.86% to 38.06%.Among of them,methionine acted the first limited amino acid,and flavour amino acids accounted for 38.42% to 43.25% of the total amount of amino acid,there were rich trace elements in Ostrea rivularis,such as Ca,Fe,Zn,and Se.The content of fat in eviscerated Ostrea rivularis was lower than that of the whole,while the protein content was higher than that of the whole Ostrea rivularis.The total amino acid content showed slight increasing to 5.83 g/100 g.Essential amino acid in eviscerated Ostrea rivularis was accounted for 35.59% of total amino acid,while flavour amino acid accounted for 41.16%.The content of mineral elements were similar to the whole Ostrea rivularis,and the content of zinc increased.Therefore,Ostrea rivularis was a kind of aquatic product with good quality and high nutritional value,and the nutritional value was increased slightly in eviscerated Ostrea rivularis.It was of great significance to protect the safety of consumer that remove oyster visceral mass to eat.