GB/T 1819.14-2006 Determination of copper in tin concentrate by flame atomic absorption spectroscopy (AAS). The tin concentrate sample is first processed to dissolve the copper element. The copper atomization is carried out with the help of a Flame atomization device, and the absorption degree of copper atoms to specific wavelengths of light is measured by a light spectrum instrument. The copper content is accurately calculated by Absorbance according to the pre-established copper standard Linear dispersion. The standard makes detailed provisions on Sample Handling, instrument operation and data processing, which provides key technologies for tin concentrate mass testing and helps to accurately evaluate the quality of tin concentrate. It is widely used in tin mining, beneficiation and smelting industries.