配位滴定法连续测定铁铝钛的研究及应用

Study on Measuring Continuously Iron, Aluminium, Titanium with Coordination Titration

以5-Br-PADAP作指示剂,pH值1.8～2.2,EDTA滴定铁(Ⅲ); 用过量的EDTA在pH值3、煮沸下与钛(Ⅳ)和铝(Ⅲ)生成稳定的配合物;再以苦杏仁酸、氟化钾分别置换Ti-EDTA、Al-EDTA配合物中的EDTA,用硫酸铜回滴法于pH值4.8分别测定钛(Ⅳ)、铝(Ⅲ)。

Iron was titrated by EDTA with the indicator of 5-Br-PADAP at pH1.8～2.2; The complexs ofAl-EDTA and Ti-EDTA are formed by boiling the solution at pH3. EDTA was substituted by phenylglycdicacid from Ti-EDTA and potassium fluoride from Al-EDTA. The titanium and Aluminium were detected bybacktitration with CuSO4 at pH4.8.