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研究了新显色剂二溴对甲基偶氮甲磺光度测定铈组稀土总量的方法。在酸性介质中,试剂与以铈组稀土为代表的稀土形成蓝色配合物,在644nm有最大吸收,铈含量在0～15μg/25ml范围内符合比耳定律。方法应用于钢铁中铈组稀土总量的直接测定,发现其准确性和重视性良好。
A new chromogenic reagent dibromo methyl methanesulfonate photometric determination of the total rare earth cerium group method. In acidic medium, the reagent formed a blue complex with the rare earth represented by rare earth cerium group and had the maximum absorption at 644 nm. Beer ’s law was obeyed in the range of 0-15 μg / 25ml cerium. The method was applied to the direct determination of total rare earths in the group of cerium in steel and found that its accuracy and importance were good.