在0.5～4N盐酸介质中,钛与二安替比林甲烷生成黄色络合物,吸收峰在390毫微米,其灵敏度与铬变酸接近。钴、镍、铝、钙、镁、铬、锰、锌与二安替比林甲烷不形成有色络合物,不干扰测定。Fe~(3+)、V~(5+)的影响,可用抗坏血酸消除,在铸造铝合金中,含硅量较高,实验证明:其含量超过5%时,能使二安替比林甲烷析出,溶液出现浑浊,加入酒精可避免浑浊出现。在拟定的操作条件下。少于0.5毫克的银,不产生氯化银浑浊。有抗坏血酸存在下,Fe~(3+)、Cu~(2+)及大量NO_3~+均不影响钛的测定。NO_3~-存在时,络合物显色后10分钟即稳定;无NO_3~-存在时,显色后40分钟达到稳定,二者的 In 0.5 ~ 4N hydrochloric acid medium, titanium and diantipyryl methane generated yellow complexes, the absorption peak at 390 nm, its sensitivity and chromogenic acid close. Cobalt, nickel, aluminum, calcium, magnesium, chromium, manganese, zinc and diantipyryl methane do not form colored complexes and do not interfere with the assay. Fe 3+ and V 5+ can be eliminated by ascorbic acid. In the cast aluminum alloy, the silicon content is high, and the experiment proves that when the content exceeds 5%, the diantipyryl methane Precipitation, the solution appeared cloudy, add alcohol to avoid the appearance of turbidity. Under the proposed operating conditions. Less than 0.5 mg of silver does not produce turbidity of silver chloride. In the presence of ascorbic acid, Fe 3+, Cu 2+ and a large amount of NO 3+ did not affect the determination of titanium. In the presence of NO_3 ~ -, the complex is stable 10 minutes after the color development; in the absence of NO_3 ~ -, it is stable 40 minutes after the color development.