【摘要】 提出了以饱和硝酸 -氯酸钾或硝酸 -高氯酸溶样 ,硫酸脱水 ,醋酸铵消除硫酸铅干扰的重量分析法 ,测定出口铅精矿中二氧化硅的含量 .方法简便快速 ,分析结果准确可靠 ,加料回收率为 10 1%～ 10 5% ,相对标准偏差为 0 .4 5%～ 2 .0 2 % .更多还原

【Abstract】 A gravimetric analysis method has been proposed for the determination of the Si O2 contentin lead concentrate to be exported.The sample is first dissolved in saturated HNO3- KCl O3(or HNO3- HCl O4) ,then it is dehydrated with H2 SO4.After that,NH4AC is added to eliminate the interference of lead sulfate.The method is simple and rapid and the analysis result is accurate and reliable.The addition recovery is1 0 1 %～ 1 0 5 % and the relative standard deviation is 0 .45 %～ 2 .0 2 % .更多还原