目前,测定铬铁矿中微量钛的常用比色法有过氧化氢法、变色酸法、钛铁试剂法及二安替比林甲烷法。这些方法用于测定微量钛,灵敏度尚嫌偏低。为了提高灵敏度,有关文献中提出了用三元铬合物进行分光光度测定。这些方法有钛—DAPM—二氯化锡三元铬合物法、钛—硫氰酸盐—二苯胍法、钛—硫氰酸盐 At present, the commonly used colorimetric method for the determination of trace titanium in chromite is hydrogen peroxide method, chromotropic acid method, ferrotitanium reagent method and diamipin methane method. These methods for the determination of trace titanium, the sensitivity is still too low. In order to improve the sensitivity, the literature proposes the use of ternary complexes for spectrophotometry. These methods include titanium-DAPM-tin dichloride ternary complex method, titanium-thiocyanate-diphenylguanidine method, titanium-thiocyanate