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本文介绍在一定量钙、钡共存下测定锶的新方法。在0.48mol／LH2SO4介质中，二溴邻羧基偶氮氮膦与锶形成2：1的蓝色络合物，最大吸收波长为630nm。摩尔吸光系数为3．2×104L·mol－1·cm－1，据量在0～1mg／L范围内符合比耳定律。经过二氧化锰共沉淀分离富集后，可测定各种复杂铝合金样品中痕量锶。
This article describes a new method for the determination of strontium in the presence of a certain amount of calcium and barium. In 0.48mol / LH 2 SO 4 medium, dibromocarboxy azoniaphosphine forms a 2: 1 blue complex with strontium, with a maximum absorption wavelength of 630 nm. Moore’s absorption coefficient is 3.2 × 104L · mol-1 · cm-1, according to the amount of 0 ~ 1mg / L in line with Beer’s law. After manganese dioxide coprecipitation separation and enrichment, the determination of trace amounts of strontium in a variety of complex aluminum alloy samples.