原子吸收分光光度法测定粗铜中的金银

Determination of Au and Ag in the Unrefined Copper With the Atomic Absorption Spectrophotometry

试样经硝酸和王水溶解，在含HNO3的硫脲介质中直接喷测银。金则在2NHCI介质中用MIBK萃取，并经含（NH4）2HPO4的HCI溶液洗涤除铁后喷测。该法灵敏度高、准确性好．适用于粗铜中金银的测定。回收率金为95．0％～99．8％，银为98．6％～105％，结果令人满意，

After the sample is dissolved with nitric acid and aqua regia,Ag is determinated in Sulphur-Urea medium Contain HNO3.Au is determinated in the HCL medium,with MIBK extraction,and after Fe is eliminated and Au is washed With HCl solutionContain(NH4)2HPO4. The method apply to determinating Au and Ag in the Unrefined Copper,Because of its high sensitivity andgood accuracy.