论文部分内容阅读
磁钢中铝的络合滴定,通常采用强碱分离法、铜试剂沉淀分离苦杏仁酸掩蔽法。强碱分离法费时较长,铜试剂分离法钛仅部分沉淀,余量用苦杏仁酸掩蔽,滴定终点往往不稳。资料介绍,在用铜试剂分离手续中配入苯胂酸的方法,能使钛被共沉淀分离。据此,我们进行了试验。样品用稀硝酸溶解后,加入一定量的苯胂酸和铜试剂,在pH2～3的微酸性溶液中,磁钢中主要成分铁、钴、镍、铜、钛等均被沉淀分离,经一次分离后不需加入掩蔽剂,就能测定含铝量。方法快速、操作简便、结果准确。
Magnet aluminum complex titration, usually using strong alkali separation method, copper reagent precipitation separation of mandelic acid masking method. Alkali separation method takes longer time, the copper reagent separation method is only partially precipitated titanium, the remainder masked with mandelic acid, titration end point is often unstable. Data introduction, with copper reagent separation procedures with phenylarsonic acid method, can make titanium by coprecipitation separation. Based on this, we conducted a test. After the sample is dissolved with dilute nitric acid, a certain amount of phenylarsonic acid and copper reagents are added. In a slightly acidic solution of pH 2 to 3, iron, cobalt, nickel, copper, titanium and the like, which are the main components in the magnet, are precipitated and separated once, Separation without masking agent, you can determine the amount of aluminum. Method is fast, easy to operate, the result is accurate.