摘要
在pH4.5的弱酸介质中,钇与对氯偶氮氯膦形成1:1的β型络合物,其最大吸收波长和表观摩尔吸光系数分别为746nm和1.56×10~5。方法用于钴基合金中微量钇的测定,结果满意。
Chlorophosphonazo-p-cl reacts with yttrium in pH4.5 buffer solution to form a 1:1 type complex, which gives a high absorption at 746nm, can be used to determine yttrium. Under the experimental conditions Beer's law is obeyed for 3-14ng of yttrium in 25ml of solution, and the determination range is 0-11g Y/25ml by using the standard addition-deduction method. The interference of accompanying elements can be eliminated by masking. A method for spectrophotometric determination of mir.roamounts of yttrium in cobalt-base alloys is described. The results obtained agree well with those obtained by chlorophosphonazo-p-nitro method and the recovery is also satisfactory.
出处
《冶金分析》
CAS
CSCD
北大核心
1989年第4期33-36,共4页
Metallurgical Analysis
基金
中国科学院科学基金资助课题
