相同生长环境下3种蔬菜对钾、钙、镁、铅元素的富集特性研究

Study on the enrichment characteristics of K,Ca,Mg and Pb in three vegetables under same planting environment

选取相同生长环境下的荆芥、藿香和小茴香3种蔬菜,以微波消解法对样品进行前处理,在优化的测定条件下采用原子吸收光谱法测定样品中钾(K),钙(Ca),镁(Mg),铅(Pb) 4种元素含量.结果表明:荆芥、藿香和小茴香的茎和叶中均含有较丰富的K,Ca,Mg.同时,3种蔬菜全株中均检测到一定含量的重金属元素Pb. 4种元素在蔬菜中不同部位的富集特性具有明显差异.其中,K较易富集在荆芥茎、藿香茎和小茴香叶中,Ca和Mg较易富集在3种蔬菜叶中.在日常生活中,人们可以根据不同蔬菜所含微量元素、矿物质的不同,针对自身的需求选择蔬菜,保持微量元素在体内的平衡,促进身体健康.

Three vegetables of thistle,patchouli and fennel in same growing condition were collected,pretrea-ted by microwave digestion and determined for contents of K,Ca,Mg and Pb by atomic absorption spectrometry method.The results showed that the stems and leaves of three vegetables contained abundant K,Ca and Mg.Moreover,a certain amount of Pb was also detected in whole plants of three vegetables.The enrichment characteristics of four elements across different parts of three vegetables were specific.In that,the element K was preferentially accumulated in stem of thistle and patchouli and leaf of fennel.By contrast,the Ca and Mg were preferentially accumulated in leaves of thistle,patchouli and fennel.In daily life,people can choose vegetables according to their different requirements based on the different trace elements and mineral elements in different vegetables to keep balance of trace elements in body and keep health.