应用ICP-MS/ICP-AES测定榆钱中22种微量元素的含量

榆钱是我国民间的一种优良野生食品资源.随着人们对食品安全意识的增强,其营养成分与有毒成分的含量逐渐受到人们的重视.借助ICP-MS/ICP-AES技术对野生榆树榆钱中的22种微量元素进行了研究.结果发现榆钱中含有丰富的人体所必需的元素,特别是Mg,Ca,Mn,Fe,Cu,Zn,Sr和Rb,分别达到224.57,269.73,9.23,64.93,1.68,4.79,7.68和2.21 μg·g-1(FW)(FW表示鲜重(下同));Li,B,V,Co,Ni,Se,Br,Mo和Sn,也分别达到318.43,518.83,265.52,108.50,411.21,34.51,51.72,109.90和31.51 ng·g-1(FW).除了有益元素以外,重金属元素Pb,Cd,As,Hg和Cr的含量也分别达557.87,8.81,345.55,0.78和347.97 ng·g-1(FW),其含量偏高,虽然符合国家食品卫生标准,但是应当注意重金属含量的监测.

Application of ICP-MS/ICP-AES to Detection of 22 Trace Elements in Fruits of Elm

Fruit of elm has been a popular food in Chinese county for many years. With the rapid development of food nutrition and food safety, more and more people begin to pay attention to its content of trace elements and heavy metals. The wild fruit of elm was studied by ICP-MS/ICP-AES to detect the 22 trace elements. The results showed that the fruit of elm contained many trace elements which are necessary to human health: The concentrations of Mg, Ca, Mn, Fe, Cu, Zn, Sr and Rb were 224.57, 269.73, 9.23, 64.93, 1.68, 4.79, 7.68 and 2.21 microg x g(-1) (FW) respectively; while those of Li, B, V, Co, Ni, Se, Br, Mo and Sn were 318.43, 518.83, 265.52, 108.50, 411.21, 34.51, 51.72, 109.90 and 31.51 ng x g(-1) (FW), respectively. Except the wholesome trace elements, contents of heavy metals (As, Cr, Pb and Cd) are also the important standard to identify the quality of food, and the results showed that the concentrations of heavy metals, Pb, Cd, As, Hg and Cr were respectively 557.87, 8.81, 345.55, 0.78 and 347.97 ng x g(-1) (FW) in fruit of elm, which meet the national hygiene standards.