铝络合滴定中,钛的存在无论用返滴定方式或氟化物取代法,钛的含量都加合在铝的结果上。钛与EDTA生成中等强度的络合物,但由于钛易水解,生成的络合物往往不定量,而影响铝的结果。因此寻找钛的有效掩蔽剂具有实用意义;钛的干扰消除方法,文献上已介绍过很多,如用酒石酸、磷酸盐、钛铁试剂及乳酸等掩蔽或加过氧化氢使钛络合。上述方法副作用较多,如过氧化氢,氧化破坏多余的EDTA, In aluminum complex titration, the presence of titanium, either by back titration or fluoride substitution, results in the addition of titanium to the aluminum results. Titanium and EDTA generate moderate complexes, but due to the hydrolysis of titanium, the resulting complexes tend to not quantify the effects of aluminum. Therefore, the search for an effective masking agent of titanium has practical significance; titanium interference elimination method has been introduced in the literature, such as tartaric acid, phosphate, ilmenite reagents and lactic acid, such as masking or hydrogen peroxide to complex titanium. Side effects of the above methods are more, such as hydrogen peroxide, oxidative destruction of excess EDTA,