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.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2009年第9期1268-1270,共3页
Acta Armamentarii
关键词
分析化学
硅(IV)
分光光度法
硅钼蓝
钼酸铵
水样
analytical chemistry
silicon（IV）
spectrophotometry
silicomolybdate blue
ammonium molybdate
water sample
