摘要
建立镁合金中杂质铜、铁元素含量的分光光度测定方法。在酸性体系中，铜和铁与亚硝基R盐分别形成黄绿色络合物，其中λmax（Cu）=450nm，λmax（Fe）=720nm，铜、铁络合物的表观摩尔吸光系数分别为1.1×10^4L·mol^-1·cm^-1，0.7×10^4L·mol^-1·cm^-1。铜、铁的质量浓度分别在0．2-12μg／ml，和0．1-16μg／mL时工作曲线呈线性。方法用于镁合金中铜和铁的测定，相对标准偏差为2．06%-3．25％，结果同原子吸收光谱法的测定结果吻合。
A spectrophotometric method for the determination of copper and iron in magnesium alloy was established in this study. In acid system, copper and iron could react with nitroso-R-salt to form a yellow green complex with λmax（Cu）=450 nm and λmax（Fe） =720 nm. The apparent molar absorptivity of copper and iron complexes were 1.1×10^4L·mol^-1·cm^-1 and 0.7×10^4L·mol^-1·cm^-1, respectively. The calibration curve was linear over the range of 0.2-12μg/mL and 0.1-16μg/mL for copper and iron respectively. The method has been applied to the determination of copper and iron in magnesium alloy with the relative standard deviation of 2.06%-3.25%. The results are accordant with those obtained by AAS.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2008年第4期70-72,共3页
Metallurgical Analysis
基金
重庆市教委自然科学基金项目(KJ071408)
关键词
镁合金
铜
铁
亚硝基R盐
分光光度法
magnesium alloy
copper
iron
nitroso-R-salt
spectrophotometry
