摘要
采用草酸隐蔽 -偶氮氯膦Ⅲ光度法测定球铁QT 4 0 0 - 1 8中残余稀土 ,在pH值为 0 .4～ 0 .9的硫硝混合酸介质中 ,偶氮氯膦Ⅲ能与稀土形成蓝色配合物 ,最大吸收波长位于 6 70nm处 ,稀土含量在 0 .0 1 8%～ 0 .0 58%范围内符合比耳定律。该方法分析速度快 ,准确度高 ,可以满足生产需要。
In a mixed acid medium with pH 0.4-0.9, rare earth reacts with CPA-III to form a blue complex. Its absorption maxima is at 670nm.It accords with Beer's law when rare earth elements is in the concentration range of 0.018%-0.058%. The method has quick analyzing speed and high accuracy and it can meet the needs of production.
出处
《山东冶金》
CAS
2003年第5期47-48,共2页
Shandong Metallurgy
关键词
稀土
球墨铸铁
偶氮氯膦
光度法
测定
CPA-III
ductile cast iron with rare earth elements
remainder rare earth eleme nts
photometry
