当有大量钛存在下测定铝,用通常方法需分离钛,文献指出,苦杏仁酸与钛(Ⅳ)有很强的络合能力,文献制订了以苦杏仁酸隐蔽钛,络合滴定法快速测定铝矾土中三氧化二铝。我们在文献的基础上,试验了用铬天青S测定铅时苦杏仁酸对钛的隐蔽性能,以及共存元素和溶样盐类的影响等。结果表明,苦杏仁酸对钛的隐蔽能力很强,0.06克苦杏仁酸可隐蔽 The determination of aluminum in the presence of a large amount of titanium and the separation of titanium by conventional methods have shown that mandelic acid has a strong ability to complex with titanium (IV) and has been developed with concealed titanium by mandelic acid, rapid complexometric titration Determination of bauxite alumina. On the basis of the literature, we tested the concealment performance of mandelic acid on titanium by using chromazurol S, and the influence of coexisting elements and dissolved salts. The results show that mandelic acid has a strong ability of concealing titanium and 0.06 g of mandelic acid can be hidden