Copper such as waste copper, copper scrap, and waste solution of copper chloride has been recovered and smelted as the electrolytic copper. Copper wire, copper plate, copper pipe, copper wire, copper foil and other copper oxide are manufactured by usi...
Copper such as waste copper, copper scrap, and waste solution of copper chloride has been recovered and smelted as the electrolytic copper. Copper wire, copper plate, copper pipe, copper wire, copper foil and other copper oxide are manufactured by using the electrolytic copper again. They are going into other manufacturing industry again. But Recycling metals in the Resource Circulation Industry Certification Authority are now required to undergo GR certification to be able to distribute these recycled materials. However, there is no standard analysis method to evaluate this. Standardization of the method for analyzing the content of impurities in the recovered copper metal is required.
Generally, it depends on Inductively Coupled Plasma Atomic Emission Spectrometer (ICP). It is impossible to directly measure impurities based on the absolute calibration curve when measuring impurities. This is because Cu, which is the main component, affects the measurement of trace impurities (Cu Matrix Effect) and cannot measure the true value. This is because the characteristics of the pure calibration curve and the characteristics of the sample solution are different and thus cannot be matched. Analytical results of the concentration of impurities in the Copper standard sample solution(SRM) for using the Cu matrix no matched standard calibration curve at various wavelength by ICP showed that found values were on the increase or decrease as the rate of a regular equation as the concentration of Cu was increased because of the Cu matrix effect. Analytical results of the concentration of impurities in the Copper standard sample solution (SRM) for using the matrix no matched standard calibration curve at various wavelength showed that accuracy is very poor (60% ~-8500% in case of Ag) for detecting value of impurities at all wavelengths by Cu matrix effect. The accuracy of Cu matrix matching method was 99.9% or more, and it was proved that the measurement of impurities in copper metal should use the Cu matrix matching method. Also, the best reproducible wavelength can be selected when using the Cu matrix matching method.