摘要
本文拟定了对氯偶氮氯膦(CPA-pC)光度法测定矿石中微量钪的方法。矿样用过氧化钠熔融,PMBP—乙酸丁酯萃取分离干扰元素,在硝酸介质中,用沸水加热,使CPA-pC与钪反应生成β型络合物,最大吸收波长762nm,表观摩尔吸光系数ε_(762)=1.20×10~5L.mol^(-1).cm^(-1),络合物至少稳定4小时,在25ml显色体积内,钪含量2—7μg范围内符合比耳定律。应用于矿石中微量钪的测定,获得了满意结果。
In HNO3 medium, the β-type complex of CPA-pC with Sc has an absorption maximum at 762 nm and its molar absorptivity is 1.2×105L.mol-1·cm-1. The complex is stable for at least 4 hrs. Beer's law is obeyed for 2.0-7.0μg Sc/25ml. On this basis a new method for the determination of Sc in ores is presented.
出处
《岩矿测试》
CAS
CSCD
北大核心
1989年第2期129-131,共3页
Rock and Mineral Analysis
