一次溶样原子吸收光谱法连续测定高海拔地区矿石中铜铅锌银

Continuous Determination of Copper,Lead,Zinc,and Silver in Ore Samples by Atomic Absorption Spectrophotometry in High Altitude Region

针对高海拔地区大气压低、水的沸点低,Cu、Pb、Zn、Ag需分别溶样测定。故采用火焰原子吸收法一次溶样连续测定矿石中的Cu、Pb、Zn、Ag。矿样用HCl＋HNO3＋HF＋HClO4混酸完全溶解,用EDTA溶液定容至500ml容量瓶中。方法精密度（RSD,n=9）小于7.5%,加标回收率为95.6%~106.7%。方法检出限为：Cu0.0017μg/ml,Pb0.0328μg/ml,Zn0.0101μg/ml,Ag0.0021μg/ml。方法用于测定矿石样品中的Cu、Pb、Zn、Ag结果与北京矿冶研究总院外检值相符。

Because of the low atmospheric pressure aud low water boiling point in the high altitude,Cu,Pb.Zn and Ag need respectively determination of sample dissolution. Flame atomic absorption spectrometry determination of ore samples dissolution of Cn, Pb,Zn,Ag.[n the samples of ore,mixed acid,with HCI＋HNO3＋HF＋HCIO4,and is set the volume to 500ml volumetric flask by using EDTA.Tbe method precision（RSD,n=9） is less than 7.5%.The recoveries of the method for the elements are 95.6%--106.7%.The relative standard deviatations are：Cu0.0017μg/ml,Pb0.0328μg/ml,Zn0.0101μg/ml,Ag0.0021μg/ml. This method has been applied to the determination of Cu.Pb.Zn and Ag in the ore samples and the results are in agreement with outside inspection values of Beijing Research Institute of Mining and Metallurgy.