摘要
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。
A new method for the spectrophotometric determination of strontium in the pres ence of calcium and barium is described.Dibromo-0-carboxychlorophosphonazo forms with strontium a 2: 1 blue complex in sulfuric acid medium with a molar absorbtivity of 3.2× 104L· mol-2· cm-1 at 630 urn. Beer’ s law is obeyed in the range of 0~1mg/L of stron tium. Through separation and concentration by coprecipitation with manganese dioxide, mi croamounts of strontium in various samples ofaluminium alloys can bedetermined with sat isfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1996年第3期318-320,共3页
Chinese Journal of Analytical Chemistry
关键词
二溴邻羧基
偶氮氯膦
分光光度法
锶
铝合金
Dibromo-o-carboxychlorophosphonazo,spectrophotometry,strontium,coprecipitation,aluminium alloys