烧焙法分解—阳离子交换分离和质谱法分别测定植物试样中的微量元素

Methods of Determination of Trace Element Including F,Cl,S,Se,Br,I in Botanical Samples

采用碳酸钠—氧化锌氧化焙烧以氧化分解植物叶片粉末,被转化为无机F、Cl、S、Se、Br、I等被烧结剂吸收,进而用水浸取,F-、Cl-、SO42-、Se2+、Br-、I-进入溶液,经阳离子树脂交换分离,离子色谱法测量F-、Cl-、SO42-,ICP-MS测量Se2+、Br-、I-。方法快速、简便,具有精密度好、准确度高。经国家一级标准物质分析,重复性较好。

In this paper,sodium carbonate-zinc oxide roasting to oxidative decomposition of leaf powder is converted to inorganic F,Cl,S,Se,Br,I and other agents absorbed by sintering,further it is extracted with water.F-,Cl-,SO2-4,Se2＋,Br-,I-are entered in solution after cationic exchange separation.F-,Cl-,SO2-4 are measured by ion chromatography,Se2＋,Br-,I-are measured by ICP-MS.Method is rapid,simple,with good precision and high accuracy.Repeatability is good according as the standard values through analysis.