钼蓝分光光度法测定钼铝与钒铝合金中的硅  

Determination of silicon content in aluminium- vanadium and aluminium-molybdenum master alloys by molydenum blue spectrophtometric method

作　　者：孙宝莲[1] 罗琳[1] 王金磊[1] 周恺[1] 张丹莉[1] 

机构地区：[1]西北有色金属研究院,西安710016

出　　处：《分析试验室》2015年第4期457-461,共5页Chinese Journal of Analysis Laboratory

摘　　要：采用硝酸、氢氟酸分解试样,钼蓝分光光度法测定钒铝、钼铝合金中的硅量。对试样分解、光度法测定条件及共存元素的干扰等进行了试验。将该法应用于6个钒铝、钼铝试样中硅量（0.04%～0.46%）的测定,结果的相对标准偏差（n=11）在1.2%～4.6%之间,加标回收率为97.4%～102.2%。同时进行了多家实验室间数据比对,结果一致。A method for the determination of silicon in aluminium-vanadium and aluminium-molybdenum master alloys by molybdenum blue spectrophotometric method is presented. The samples were digested by nitric acid and hydrofluoric. The influence factors including sample digestion,spectrophotometric conditions and interference of co-existence elements were discussed to optimize the experimental condition. The proposed method was applied to determine the silicon content in six aluminium-vanadium and aluminium-molybdenum master alloys whose silicon content was different from 0. 04% to 0. 46%. The results showed that the relative standard deviations（ RSS,n =11） were between 1. 2% ～ 4. 6% and the recoveries were in the range of 97. 4% ～ 102. 2%. The results were consistent with those obtained in other labratories.

关 键 词：分光光度法 钼铝合金 钒铝合金 硅 测定 

分 类 号：O657.3[理学—分析化学]