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以往有钛存在下滴定铝未获成功,因尚未找到能隐蔽钦的适当试剂。因此,有建议以铜铁试剂沉淀铁和钛或以铜铁试剂-氯仿萃取分离铁和钛,然后作铝的滴定。有提出测定高铝耐火材料中的铁铝钛是在 pH 1.5滴定铁,继加入过氧化氢在 pH 5.5滴定钛铝合量,再用过氧化氢比色法测定钛,从钛铝合量减去钛量才得铝量。这些方法都比较繁复。我们曾发现乳酸和苹果酸对钛有很强的络合能力,均能隐蔽钛
In the past, titration of aluminum in the presence of titanium was unsuccessful, as no suitable reagents have been found to mask Qin. Therefore, it has been suggested that iron and titanium be precipitated with a copper-iron reagent or iron and titanium by a copper-iron reagent-chloroform extraction, followed by titration of aluminum. It has been proposed that the determination of Fe-Al-Ti in high-alumina refractories should be titrated at pH 1.5, followed by the titration of Ti-Al by hydrogen peroxide at pH 5.5. Titanium is then measured by hydrogen peroxide colorimetry, Decades to get the amount of aluminum. These methods are more complicated. We have found that lactic acid and malic acid have a strong ability to complex titanium, all of which can hide titanium