摘要
在碱性介质中,铁(Ⅲ)与对氨基苯基荧光酮和变色酸及乳化剂OP发生显色反应,据此建立了分光光度法测定铁的方法。研究发现:铁(Ⅲ)与对氨基苯基荧光酮及变色酸及OP形成了绿色的四元混配胶束络合物,该络合物的最大吸收波长为620 nm,且络合物中铁(Ⅲ)与对氨基苯基荧光酮及变色酸的组成比nFe(Ⅲ)∶nAPF∶nCA为1∶2∶1。在10 mL溶液中铁质量在1~10μg范围内服从比尔定律,相关系数为0.999 5。方法用于铝合金样品中微量铁的测定,结果同经典的邻二氮杂菲法所得结果相吻合。
A spectrophotometric determination method of iron was established based on the color reaction between Fe(Ⅲ) and p-aminophenylfluorone(APF),chromotropic acid and emulsifier OP in alkaline medium.It was found that Fe(Ⅲ) could form a green quaternary blending micellar complex with APF,chromotropic acid(CA) and OP.The maximum absorption wavelength of this complex was at 620 nm.The composition ratio was nFe(Ⅲ)∶nAPF∶nCA=1∶2∶1.Beer's law was obeyed for iron in 1-10 μg/10 mL with the correlation coefficient of 0.999 5.The proposed method was applied to the determination of trace iron in aluminium alloy samples,and the results were consistent with those obtained by classical o-phenanthroline analysis method.
出处
《冶金分析》
CAS
CSCD
北大核心
2010年第4期77-80,共4页
Metallurgical Analysis
基金
国家自然科学基金项目(20977040)
江苏省高校自然科学研究计划项目(05KJB150003)
关键词
对氨基苯基荧光酮
变色酸
分光光度法
铁
铝合金
p-aminophenylfluorone
chromotropic acid
spectrophotometry
iron
aluminium alloy