华东师范大学化学系赵泓等老师合成一系列含有邻、邻′二羟基偶氮基功能团的变色酸双偶氮衍生物。并研究这些显色剂与钪的显色反应。发现均三溴氯磺酚对钪具有灵敏度高(ε=2.98×10~4升/摩尔·厘米)、选择性好的特点,特别对铈组稀土抗干扰能力 Department of Chemistry, East China Normal University Zhao Hong and other teachers to synthesize a series of ortho, o ’dihydroxy azo functional groups of chromotropic acid disazo derivatives. The color reaction of these developers with scandium was also studied. It was found that tribromochlorosulfonates have high sensitivity (ε = 2.98 × 10-4 L / mol · cm) to scandium and good selectivity, especially for anti-interference ability of cerium rare earth