Determination of magnesium,titanium,cobalt,boron,chromium and beryllium in regenerated copper by inductively coupled plasma atomic emission spectrometry
Regenerated copper should be analyzed to understand its quality before it is put into re-produc-tion.The contents of magnesium,titanium,cobalt,boron,chromium and beryllium are quality indicators for the regenerated copper,so the accurate and rapid determination of their contents is very important.After pretreatment,the sample was dissolved with the mixture of nitric acid and hydrochloric acid with adding hydrogen peroxide dropwise.Mg 285.213 nm,Ti 336.121 nm,Co 230.786 nm,B 249.773 nm,Cr 283.563 nm and Be 313.107 nm were selected as the analytical spectral lines.The calibration curves were prepared by matrix matching method to eliminate the matrix effect.The contents of magnesium,titanium,cobalt,bo-ron,chromium and beryllium were determined by inductively coupled plasma atomic emission spectrometry(ICP-AES),realizing the simultaneous determination of six impurity elements in regenerated copper.The limits of detection were 0.000 1％-0.000 4％,and the limits of quantitation were 0.000 3％-0.001 3％.The proposed method was applied for the determination of magnesium,titanium,cobalt,boron,chromium and beryllium in regenerated copper samples.The relative standard deviations(RSD,n=9)of the determination results were less than 8％,and the recoveries were between 96％and 105％.The contents of six elements in three certified reference materials of metallic copper were determined according to the experimental meth-od,and the found results were consistent with the standard values.
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