坛紫菜与条斑紫菜微量元素富集能力研究
2021-06-16林红梅
林红梅



摘 要:采用电感耦合等离子体质谱(ICPMS)对我国南方坛紫菜及北方条斑紫菜的12种元素铬(Cr)、锰(Mn)、钴(Co)、镍(Ni)、铜(Cu)、砷(As)、硒(Se)、钼(Mo)、镉(Cd)、铅(Pb)、锌(Zn)及锡(Sn)进行含量测定。结果表明:条斑紫菜Cr、Mn、Co、Ni、Cu及Se含量极显著高于坛紫菜;坛紫菜As、Mo、Cd、Zn及Sn含量极显著或显著高于條斑紫菜;此外,条斑紫菜Pb含量与坛紫菜未存在显著性差异,进一步通过食品安全国家标准的分析,显示两种紫菜Pb含量未超标。
关键词:坛紫菜;条斑紫菜;电感耦合等离子体质谱;微量元素
中图分类号:S 917.3 文献标志码:A 文章编号:0253-2301(2021)03-0023-05
DOI: 10.13651/j.cnki.fjnykj.2021.03.005
Abstract: The study was performed to determine the contents of 12 elements including Cr, Mn, Co, Ni, Cu, As, Se, Mo, Cd, Pb, Zn and Sn in Porphyra haitanensis grown in southern China and Porphyra yezoensis grown in northern China by using inductively coupled plasma mass spectrometry (ICPMS). The results showed that the contents of Cr, Mn, Co, Ni, Cu and Se in Porphyra yezoensis were significantly higher than those in Porphyra haitanensis, but the contents of As, Mo, Cd, Zn and Sn in Porphyra haitanensis were significantly lower than those in Porphyra yezoensis. In addition, there was no significant difference in Pb content between them. Further analysis through the national food safety standard showed that the Pb content of Porphyra haitanensis and Porphyra yezoensis did not exceed the standard.
Key words: Porphyra haitanensis; Porphyra yezoensis; Inductively coupled plasma mass spectrometry; Microelement
紫菜是生长在沿海潮间带的一种大型海藻,隶属红藻门Rhodophyta、原红藻纲Protoflorideae、红毛菜目Bangiales、红毛菜科Bangiaceae、紫菜属Porphyra。紫菜具有丰富的蛋白质、多糖、维生素及矿物质等成分,其营养价值位居大型栽培海藻之首[1],全世界已发现130余种紫菜,我国已命名的紫菜约有22种[2],主要分布在黄海、渤海和东海等海域。我国最主要的栽培品种是坛紫菜和条斑紫菜,坛紫菜主要在我国南方海域种植,条斑紫菜主要在我国北方海域种植。随着紫菜人工栽培技术的逐渐成熟,我国紫菜人工种植迅速发展,种植规模逐年扩大,紫菜产量也显著提高,尤其是坛紫菜表现更为明显,产量约占全国紫菜总产量的75%[3]。
近年来,由于部分海域受污染,海产品中的重金属含量超标现象时有发生,紫菜的质量安全问题也备受关注。由于紫菜本身具有富集金属离子的特性,因而监测紫菜中的微量元素含量对控制食品安全尤为重要。现代医学研究表明,微量元素与人体健康和疾病的关系十分密切[4]。……
