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海带、紫菜两种海藻中矿物质营养元素的测定

2020-12-21陈巧

福建农业科技 2020年8期

陈巧

摘 要:为研究海带、紫菜两种海藻的营养价值与其所含矿物质元素的关系,也为人们健康合理饮食以及根据自身矿物质元素缺乏情况合理食用海带、紫菜两种海藻食品提供参考,采用微波消解联合电感耦合等离子体质谱法(ICPMS)同时测定海带、紫菜中的Mg、Ca、Mn、Fe、Cu、Zn、Se共7种矿物质元素含量。结果可知,海带中7种矿物质元素的营养素参考值 (NRV)分别为295%、130%、90%、306%、20%、17%、16%,紫菜中7种矿物质元素的营养素参考值 (NRV)分别为185%、37%、149%、303%、118%、29%、34%,表明海带、紫菜含有丰富的Mg、Ca、Mn、Fe、Cu、Zn、Se等人体必需矿物质营养素,具有较高的食用价值和保健价值。

关键词:海带;紫菜;矿物质;电感耦合等离子体质谱法

中图分类号:S968.4 文献标志码:A 文章编号:0253-2301(2020)08-0013-04

DOI: 10.13651/j.cnki.fjnykj.2020.08.003

Abstract: In order to study the relationship between the nutritional value of two kinds of seaweed and its mineral elements, and also provide reference for people′s healthy and reasonable diet and the reasonable consumption of kelp and laver according to their own lack of mineral elements, the contents of Mg, Ca, Mn, Fe, Cu, Zn and Se in kelp and laver were simultaneously determined by the microwave digestion combined with Inductively Coupled Plasma Mass Spectrometry (ICPMS). The results showed that the nutrient reference value (NRV) of the 7 kinds of mineral elements in kelp was respectively 295%, 130%, 90%, 306%, 20%, 17% and 16%, and the nutrient reference value (NRV) of the 7 kinds of mineral elements in laver was respectively 185%, 37%, 149%, 303%, 118%, 29% and 34%. The results showed that kelp and laver were rich in the essential mineral nutrients such as Mg, Ca, Mn, Fe, Cu, Zn, and Se, which had high edible value and health value.

Key words: Kelp; Laver; Minerals; Inductively coupled plasma mass spectrometry

海藻是指生長在潮间带及亚潮间带肉眼可见的大型藻类,常见的有海带、紫菜、龙须菜、石花菜、羊栖菜、裙带菜等[1]。海藻含有优质蛋白、氨基酸、膳食纤维、多种维生素、小分子多糖;海藻酸、藻胶、甘露醇、二十碳五烯酸(EPA)、二十二碳六烯酸(DHA)等活性成分;以及Ca、Mg、K、Na、P、I、Fe、Zn、Mn、Se等矿物质元素,有“海洋蔬菜”“碘的活化石”“营养宝库”的美称[2-4]。海藻不仅食用价值高,其药用价值也高,其性味咸寒,具有清热、软坚散结、促进智力发育、降脂降压、抗氧化、利尿消肿、增强免疫等功效[5-6]。随着科技的发展,海藻食品的开发和深加工利用也引起了人们的重视,为进一步了解海带、紫菜两种海藻的营养价值与其所含矿物质元素的关系,同时也为人们健康合理饮食以及根据自身矿物质元素缺乏情况合理食用海带、紫菜两种海藻食品提供参考,准确、快速地测定海带、紫菜中矿物质元素含量具有一定的意义。……

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