于 EDTA 存在时,铍作为载休,用氨水沉淀锡使与其他元素分离,然后用氧化苏木素显色测定锡的方法,是测定金属及矿石中微量锡比较好的方法。用报告所述方法测定含铬量高的试样,例如高速钢时结果常易偏高,主要系铬分离不完全,引起干扰,我们试验将铬用过氯酸或氨性中用过氧化氢氧化为高价或 In the presence of EDTA, beryllium as a load off, with ammonia precipitated with tin and other elements, and then oxidized hematoxylin tin method for the determination of trace amounts of tin in metals and ores is a better method. Determination of the method described in the report with high chromium content of the sample, such as high-speed steel often easy to high results, mainly due to incomplete separation of chromium, causing interference, we test the use of chromium perchlorate or ammonia with hydrogen peroxide Oxidation to high or