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(一) 钢铁中的钛量一般在0.1～1%范围内。重量法因缺乏特效的沉淀剂;基于以氧化还原反应为基础的容量法,则因铌、钒干扰,镍、铬、钴等有色离子妨碍判断终点等弊病,很少应用于钢铁中钛的测定。而钛的比色法则快速、准确,对各种类型的钢样,均能获得可靠的结果,故在钛的测定方法中居支配地位。如所共知,钛的比色法有多种,而用于钢铁分析的有十余种,见表1。现今,在钢铁分析中应用最多的是二安替比林甲烷,其次是变色酸,过氧化氢及钽试剂法。
(A) The amount of titanium in steel is generally in the range of 0.1 ~ 1%. Based on the volumetric method based on the redox reaction, due to the interference of niobium and vanadium, colored ions such as nickel, chromium and cobalt hinders the judgment of the end point and is rarely applied to the determination of titanium in steel . The titanium colorimetric method is fast and accurate, for all types of steel samples, can obtain reliable results, it is in the determination of titanium dominance. As we all know, there are many titanium colorimetric method, and there are more than ten kinds of steel used in the analysis, see Table 1. Today, diantipyryl methane is the most widely used in steel analysis, followed by chromotropic acid, hydrogen peroxide and tantalum reagents.