重铀酸盐中二氧化硅的分光光度法测定  

Determination of silicon dioxide in diuranite by spectrophotometric method

作　　者：丁红芳[1] 王海生[1] 孙浩波[1] 陈桂兰 

机构地区：[1]核工业北京化工冶金研究院,北京101149 [2]中核韶关金宏铀业有限公司,广东韶关512634

出　　处：《铀矿冶》2013年第2期96-100,共5页Uranium Mining and Metallurgy

摘　　要：建立硅钼蓝分光光度法测定重铀酸盐中二氧化硅的分析方法,对试验条件进行优化。试验结果表明:ρ(SiO2)在0.1～6.0μg/mL时线性良好,线性相关系数(r)>0.999,样品加标回收率为94.0%～107%;2mg磷、50mg钼、1mg砷、60mg硝酸根、20mg铁对SiO2的测定无干扰;w(SiO2)为0.340%时,测定相对标准偏差为5.9%。A method for determination of SiO2 in diuranate by silicon-molybdenum blue spectropho- tometry was established and the test conditions were optimized. Good linearity was demonstrated with SiO2 in the range of 0.1-6.0 μg/mL,with r〉0. 999 and average recovery ranging 94.0% to 107%. The RSD was 5.9% while the SiO2content was 0. 340%. 2 mg phosphor, 50 mg molybdendm, 1 mg arsenic, 60 mg nitrate and 20 mg ferric showed no disturbance on the determination of SiO2.

关 键 词：重铀酸盐 二氧化硅 硅钼蓝分光光度法 

分 类 号：TL271.4[核科学技术—核燃料循环与材料]