DBC-偶氮胂[Dibromoarsenazo,全称3-(2-胂酸基苯偶氮-6-(2,6-二溴-4-氯苯偶氮)-4,5二羟基-2,7-萘二磺酸],是一种特效的稀土显色剂,它能在强酸性介质中(大于2NHCl)与稀土形成灵敏度很高的显色反应,其摩尔吸光系数可达1.29×10~5,大多数常见干扰元素,尤其是合金元素均可允许存在数毫克至数十毫克,已广泛用于高温合金中微量稀土元素的测定。本文研究了 DBC- 偶氮胂与锆的显色反应行为,结果表明,在1.5N 盐酸介质中,锆与该 DBC-arsenazo [Dibromoarsenazo, also known as 3- (2-arsanophenylazo-6- (2,6-dibromo-4-chlorophenylazo) -4,5-dihydroxy-2,7-naphthalene Disulfonic acid] is a special effect of the rare earth developer, which can form a highly sensitive color reaction with rare earth in a strong acidic medium (greater than 2NHCl), the molar absorption coefficient can reach 1.29 × 10 ~ 5, large Most common interfering elements, especially alloying elements, can tolerate milligrams to tens of milligrams and have been widely used in the determination of trace rare earth elements in superalloys.In this paper, the color reaction of DBC-arsenazo with zirconium was studied. The results Show that, in 1.5N hydrochloric acid medium, zirconium and the