磷钒钼蓝-Sephadex G-25凝胶相双波长分光光度法测定微量磷  

DETERMINATION OF TRACE AMOUNTS OF PHOSPHORUS BY SEPHADEX G-25 GEL-PHASE DUALWAVELENGTH SPECTROPHOTOMETRIC METHOD WITH PHOSPHOVANADOMOLYBDATE BLUE

作　　者：彭悦[1] 聂基兰[1] 

机构地区：[1]南昌大学化学系,江西南昌330047

出　　处：《南昌大学学报（理科版）》2002年第1期75-78,共4页Journal of Nanchang University(Natural Science)

基　　金：江西省自然科学基金资助项目 (95 30 4 )

摘　　要：应用葡聚凝胶 (Sephadex)G - 2 5从水溶液中吸附富集磷钒钼蓝杂多酸 ,在 80 0nm和 70 0nm处应用固相分光光度法直接测定磷钒钼蓝 -凝胶相吸光度差 ,磷量在 0 - 8μg/ 5 0mL范围内符合比尔定律 ,用于分析高纯硫酸钠中微量磷 。The blue species of phosphovanadomolybdate heteropoly acid are adsorbed on Sephadex G-25 gel from the solution,the difference of absorbencies of colored Sephadex G-25 gel at 800 and 700 nm was directly measured by solid-phase sopectrophotometry.Beer's law is obeyed in the phosphorue concentration range of 0-8 μg/50 mL.It is applied to the determination of trace phosphorus in high purity sodium sulfate.The analytical result is satisfactory.

关 键 词：微量磷 磷钒钼蓝 SephadexG-25 固相双波长分光光度法 葡聚凝胶 含量测定 吸附平衡 

分 类 号：O613.62[理学—无机化学] O657.32[理学—化学]