摘要
建立了以硝酸 -硫酸溶样 ,在碱性介质中用火焰原子吸收光谱法测定铅锌混合精矿中高含量银的分析方法。对硫酸用量、碱性介质的浓度、干扰离子等进行了探讨。在 0～ 4 μg/mL范围内 ,银含量与吸光度呈线性关系 ,相关系数为 0 .999 3。加标回收率为 98.78%～ 10 2 .5 6 % ,测量结果的相对标准偏差小于 2 .0 % ,测定范围为 5 0 0～ 3 0 0 0g/t。
A method for the determination of higher content silver in lead and zinc concentrates was set up. The sample was dissolved in HNO 3 and H 2 SO 4 ,then determined by flame atomic absorption spectrometry in ammoniacal agent. The volume of sulphuric acid, concentration of alkaline medium and interfering ions are investigated. In the range of 0～4 μg/mL the concentration of silver is linear with the absorbance, with a correlative coefficient of 0.9993. The recovery is 98.78%～102.56% and RSD is less than 2.0%. The measurement range is 500～3000 g/t.
出处
《化学分析计量》
CAS
2004年第2期43-44,共2页
Chemical Analysis And Meterage
