摘要
在H2SO4介质中,偶氮氯膦Ⅲ(CPAⅢ)与铈 发生氧化褪色反应。该反应的表观摩尔吸光系数ε550=2 94×104,Ce 量在0～20μg/25mL范围内与试剂褪色程度呈线性关系。本法用于稀土球墨铸铁中铈量的测定,结果满意。
In this paper,the oxidation reaction of cerium *$ with chlorophosphonazoⅢ in the medium of sulfuric acid was studiedIn the λmax at 550nm,the apparent molar absorptivity is 294×104L·mol·cm-1The linearity range is in the concentration of 0-20μg/25mL for Ce4+.The method has been applied to the determination of cerium*$in nodular cast iron with satisfactory results
出处
《冶金分析》
CAS
CSCD
北大核心
2002年第5期47-48,共2页
Metallurgical Analysis
关键词
偶氮氯膦Ⅲ
褪色光度法
测定
球墨铸铁
铈
:decoloring spectrophotometry
nodular cast iron
chlorophosphonazoⅢ
cerium
