铁、钛、铝连续络合滴定的报导尚属少见。关键的问题是铁、钛、铝相互干扰,尤其是钛、铝之间影响较大。陈永兆介绍乳酸是钛的掩蔽剂,借此可间接滴定钛。商运来曾利用乳酸是 Ti—EDTA 络合物的良好释放剂做了钛铁中钛、铝络合滴定的试验。由于乳酸也能微弱络合铝,故钛、铝连续测定末获成功。经过试验,发现苦杏仁酸是钛的一种良好掩蔽剂,也是 Ti—EDTA 络合物的良好释放剂。即使对钛络 Iron, titanium, aluminum continuous complexometric titration is still rare. The key issue is that iron, titanium and aluminum interfere with each other, especially titanium and aluminum. Chen Yongzhao introduced lactic acid is a masking agent of titanium, titanium can be titrated indirectly. Commercial transport to the use of lactic acid is a good Ti-EDTA release agent to do titanium-titanium in titanium, aluminum complex titration test. As lactic acid can also weakly complex aluminum, titanium, aluminum continuous determination of successful. After testing, it was found that mandelic acid is a good masking agent for titanium and is also a good release agent for Ti-EDTA complexes. Even for titanium network