富硒食品中微量元素分析

Determination of Trace Minerals in Selenium Enriched Food

建立电感耦合等离子体质谱法(ICP-MS)测定富硒食品中多种微量元素,选取富硒食品和保健品,使用微波消解法消化样品,ICP-MS同时测定铝、铬、锰、铁、镍、铜、锌、砷、硒、镉、锡、锑、铊、铅含量。方法表明在较大浓度范围内(0～400μg/L)线性关系良好,配合使用微波消解,有效降低样品损耗,对三个不同加标浓度测定回收率较高,方法简单易行,准确度高。比较富硒大米和普通大米发现硒元素、重金属及其它有益元素元素含量存在差异。天然富硒食品中,小米和紫薯硒含量较高,表明这两种农作物具有较强的富集能力。

To establish a method for determination of trace minerals in selenium enriched pro-ducts by inductively coupled plasma mass spectrometry( ICP-MS). The selenium enriched agr-icultural and health care products were disposed by microwave digestion,the method of ICP-MS was used to determinate content of aluminum,chromium,manganese,iron,nickel,copper,zinc,arsenic,selenium,cadmium,tin,antimony,thallium and lead. The method showed good linear correlation( 0 ~ 400 μg/L) and recoveries with microwave digestion effectively decreased wastage. Detection process could be easily operated with high accuracy. The content of sele-nium,beneficial and heavy metal minerals were different compared with selenium enriched a-nd common rice. In agricultural products,content of selenium is obvious in millet and purple potato which certified the favourable enrichment capacity.