硼钼杂多酸-单扫描示波极谱法测定水中微量硼  

Molybdoboric heteropoly acid-single scanning oscillopolarographic determination of micro boron in water sample

作　　者：张江[1] 

机构地区：[1]烟台师范学院化学系,山东烟台264025

出　　处：《冶金分析》2006年第5期56-57,共2页Metallurgical Analysis

摘　　要：在一定浓度的H2SO4底液中,硼与钼酸铵反应形成硼钼杂多酸,该杂多酸在滴汞电极上产生一个灵敏的还原波,据此建立了硼钼杂多酸示波极谱法测定微量硼的新方法。其峰电位(Ep)为-0.88V,硼在0.004～0.04μg/mL范围内与峰高(H)呈良好的线性关系,检出限为0.002μg/mL。方法用于天然水中硼的测定,回收率为102%～118%,相对标准偏差4.6%～6.4%。In a base solution of sulphuric acid, boron（in the form of borate）reacts with ammonium molybdate to form a molybdoboric heteropoly acid which shows a sensitive absorptive reduction wave at the dropping mercury electrode with peak potential（Ep） at- 0.88 V（ vs. SCE）. The height of peak current（ip） is linear with the concentration of boron in the range of 0. 004 - 0.04 μg/mL. The detection limit of this method is found to be 0. 002 μg/mL. The method has been applied to the determination of boron in natural water with relative standard deviation of 4.6% -6.4% and recovery of 102% - 118%.

关 键 词：单扫描示波极谱法 硼 硼钼杂多酸 钼酸铵 天然水 

分 类 号：O657.14[理学—分析化学]