激光拉曼光谱法测定模拟高放废液中钼酸根  

Determination of Molybdate in Simulated High Level Liquid Radioation Waste by Laser Raman Spectroscopy

作　　者：朱海巧[1] 张倩慈[1] 罗中艳[1] 程充 常志远[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《化学分析计量》2016年第2期37-40,共4页Chemical Analysis And Meterage

摘　　要：建立激光拉曼光谱法测定模拟高放废液中钼酸根的分析方法。考察了拉曼光谱法测量钼酸根的主要影响因素。以硝酸根作为内标物,在选定的实验条件下,钼酸根与硝酸根的拉曼光谱特征峰强度比值与钼酸根浓度呈良好的线性关系,钼酸根浓度分别为0.002~0.08,0.05~0.80 mol/L时,线性方程分别为y=247c–0.178 8,y=11.36c–0.112 8,r^2>0.999,方法检出限为0.001 mol/L。采用该方法测定模拟高放废液中的钼酸根,测定值与配制值相比,相对误差小于5%,测量结果的相对标准偏差小于4%(n=6)。该方法操作简便、检测快速、制样简单、取样量小。A new method via Raman spectroscopy for determination of molybdate in simulated high level liquid radioactive waste(HLLW) was established. NO3– was used as the internal standard, various factors possibly influencing the measurement of MoO42– by laser Raman spectroscopy were studied,and then the optimum conditions for the determination of MoO42– were selected. The relative intensity of MoO42– to NO3–(1 047 cm–1) showed good linearity with the concentration of MoO42–, the linear equations werey=247c–0.178 8,y=11.36c–0.112 8 in the range of 0.002–0.08, 0.05–0.80 mol/L, respectively, the correlation coefficients(r2) were more than 0.999. The detection limit was 0.001 mol/L. Molybdate in simulated HLLW was determined by this method,the relative error of measured value compared with the standard values was less than 5%. The relative standard deviation of determination results was less than 4%(n=6). The method is simple, convenience and accurate.

关 键 词：拉曼光谱法 定量分析 硝酸根 钼酸根 高放废液 

分 类 号：O657.37[理学—分析化学]