硅铁合金中痕量硼的分光光度测定

Spectrophotometric determination of trace boron in ferrosilicon alloy

建立了蒸馏分离 -姜黄素光度法测定硅铁合金中痕量硼的方法。对在氢氟酸介质中溶样时痕量硼的挥发损失及其络合保护问题进行了试验 ,结果表明 ,通过加入适量甘露醇络合保护 ,可有效地防止痕量硼在样品溶解及其溶液蒸发过程中的挥发损失 ,并成功地用于实际样品分析 ,取得了令人满意的结果。同时 ,对所拟溶样条件下所得硼的分析结果是否为全硼问题进行了进一步探讨 ,结果证实 ,所拟溶样条件下硼的测定结果为全硼。

A spectrophotometric method for the determination of trace boron in ferrosilicon alloy was proposed The sample was dissolved in a mixture of hydrofluoric nitric acid,in which a little amount of mannitol was added to form the non volatile complex with boron,thereby preventing its loss during the evaporation of the sample solution By fuming with sulfuric phosphoric acid mixture the residual hydrofluoride was then expelled,and boron was finally determined by curcumin spectrophotometry after distillation With this method some practical applications such as determination of boron in ferrosilicon alloy etc were carried out with satisfactory results,the recovery of boron was found to be 99 3%