β修正─XO新光度法测定金属材料铜

Determination of Copper in Metal Material by β Correction--XO New Speeto photometry

在ｐＨ＝９氨性溶液中，铜（Ｃｕ￣（２＋））与二甲酚橙（ＸＯ）和ＣＴＢ反应生成紫红色化合物。采用β修正─ＸＯ新光度法测定金属材料中痕量铜。该方法灵敏度高，ＲＳＤ≤５％，加标回收率为９７．２％～１０４．０％，最低检测浓度为０．０２μｇ／ｌ。该方法适合于钢铁等中铜分析。

ln pH 9 solution copper(Cu￣(2 +) )can react with Xylenol Orange(XO)---CTB to form red compound.We determined copper in metal material byβ correction-XO nexw speetro photomctry。 lt is high at sensitivity. Experimentsfor metal material showed that RSD =5% and the recovery rate was 97.2%～104.%, The minimum determination concentration of Cu is 0.02μg/l。