Determination of seven elements in manganese brass by inductively coupled plasma atomic emission spectrometry
ZHANG Ying-ying,SHI Lei,WU Yu-qiang
Zhengzhou Non-ferrous Metals Research Institute Co.,Ltd. of Aluminum Corporation of China,The National Aluminum Smelters Research Centre of Engineering and Technology,Zhengzhou 450041,China
Abstract：The manganese brass sample was dissolved with hydrochloric acid and nitric acid. Cu 324.754 nm, Mn 257.610 nm, Zn 213.856 nm, Fe 259.940 nm, Al 396.152 nm, Sn 189.989 nm and Pb 220.353 nm were selected as the analytical lines. The interference from matrix and coexisting elements were investigated. The interference coefficient was estimated to correct the influence of spectral interference on the measuring results. The determination method of Cu, Mn, Zn, Al, Fe, Pb and Sn in manganese brass by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The results showed that the Cu with mass concentration less than 1 000 μg/mL had no significant influence on the determination of Mn, Zn, Al, Fe and Sn, but had a great impact on Pb. The spectral interference caused by overlapping of Cu 221.810 nm to Pb 220.353 nm could be well corrected by interference coefficient method. The high-content elements including Zn, Mn and Fe in sample had no mutual interference and had no significant influence on the determination of other elements. The linear correlation coefficients of calibration curves were all higher than 0.999 7. The detection limits of elements were between 0.000 1% and 0.004 2% (mass fraction). The content of Cu, Mn, Zn, Al, Fe, Pb and Sn in certified reference material of manganese brass was determined according to the experimental method. The found results were consistent with the certified values. The relative standard deviations (RSD, n=6) were between 0.49% and 5.1%.
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