交流示波极谱滴定法测定磷  

Determination of Phosphorus by Alternating CurrentOscillopolarographic Titration

作　　者：李建平[1] 刘志江[2] 

机构地区：[1]桂林工学院应用化学系 [2]沈阳工业学院化工系

出　　处：《化学世界》1999年第8期436-439,共4页Chemical World

摘　　要：在ｐＨ５．５六次甲基四胺－盐酸缓冲溶液中，用硝酸铅滴定磷酸根，生成磷酸氯化铅复盐沉淀，根据过量的铅离子在交流示波极谱图上切口出现指示滴定终点。方法准确性好，酸度范围宽，操作简便，已用于磷肥中可溶性磷的测定。An oscillopolarographic titration method for the determination of phosphorus is described. In hexamethylenetetraminehydrochloric acid buffer solution(pH5.5), the phosphate is titrated by lead nitrate to precipitation. The appearance of incision of lead ion on dE/dtE curves indicates the end point of titration. This method is accurate, rapid and simple. It is used to determine the soluble phosphorus in phosphate fertilizers.

关 键 词：磷酸根 测定 磷酸盐 交流示波极谱 滴定 硝酸铅 

分 类 号：O613.62[理学—无机化学]