【摘要】 在pH 2.0的HCl-KCl溶液中,安替吡啉偶氮Ⅲ与稀土形成蓝色配合物,铈、镱配合物的表观摩尔吸光系数分别为:εCe=7.917×104L.mol-1.cm-1,εYb=4.759×104L.mol-1.cm-1。稀土(Ⅲ)的质量浓度在0~1.2μg.ml-1范围内符合比耳定律。方法灵敏可靠,用本法测定人工合成样品中稀土的总量,结果满意。更多还原

【Abstract】 In pH 2.0 HCl-KCl solution rare earths react with antipyrylazo Ⅲ to form a blue complex.The molar absorptivity of the complex with Ce is ε_Ce=7.917×10⁴ L·mol^-1·cm^-1 and with Yb is ε_Yb=4.759×10⁴ L·mol^-1·cm^-1.Beer′s law is obeyed for Ce³⁺ and Yb³⁺ in the range of 0～1.2 μg·ml^-1.The method is sensitive and credible.The method has been applied to the direct determination of rare earths synthesized sample with satisfactory results.更多还原