硅钼蓝分光光度法测定环境水样中的硅  

Spectrophotometric Determination of Silicon in Environmental Water Sample with Silicomolybdate Blue

作　　者：于辉[1] 翟庆洲[1] 杨辉[1] 

机构地区：[1]长春理工大学纳米技术研究中心,吉林长春130022

出　　处：《兵工学报》2009年第9期1268-1270,共3页Acta Armamentarii

摘　　要：Si（Ⅳ）与钼酸铵在盐酸浓度为0.050 mol.L^-1时生成硅钼黄,当盐酸浓度为1.48 mol.L^-1时经抗坏血酸还原硅钼黄生成硅钼蓝,其最大吸收波长位于346 nm,表观摩尔吸光系数3ε46 nm=4.5×104L.mol^-1.cm^-1,硅（IV）量在0.1-2.8μg.mL^-1范围内遵守比耳定律。考察了36种常见共存物质的影响。本法成功地用于环境水样中硅的测定,获得了满意的结果。Silicon（IV） reacts with ammonium molybdate to form silicomolybdate yellow at hydrochloric acid concentration of 0.050 mol·L-1.Silicomolybdate yellow is reduced by ascorbic acid and forms silicomolybdate blue at hydrochloric acid concentration of 1.48 mol·L-1.The maximum absorption of the complex exhibits at 346 nm and the molar absorptivity is ε346 nm=4.5×104 L·mol-1·cm-1.Beer＇s law is obeyed over the range of 0.1～2.8 μg·mL-1 of silicon（IV）.The effect of thirty-six common co-existing substances on the determined results of silicon（IV） was observed.The method was successfully used in the determination of silicon in environmental water sample with satisfactory results.

关 键 词：分析化学 硅(IV) 分光光度法 硅钼蓝 钼酸铵 水样 

分 类 号：O611.4[理学—无机化学]