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3种重氮氨基类新显色剂的合成及其与镉(Ⅱ)的显色反应。在表面活性剂 Triton X-100存在下,3种试剂均与镉(Ⅱ)生成络合比为3:1的红色络合物。其表观摩尔吸光系数在1.80×10~5以上。镉量在0～12μg/25mL 符合比尔定律。并对3种试剂的性能与结构的关系作了比较。将其中一种试剂(BPDAA)用于废水中痕量镉的测定,结果满意。
Synthesis of Three New Diazoamino Agents and Their Color Reaction with Cadmium (Ⅱ). In the presence of the surfactant Triton X-100, all three reagents produced a red complex with a complex ratio of 3: 1 to cadmium (II). The apparent molar absorption coefficient of 1.80 × 10 ~ 5 or more. Beer’s law is obeyed in the range of 0 ~ 12μg / 25mL. The relationship between the performance and structure of the three reagents was also compared. One of the reagents (BPDAA) for the determination of trace cadmium in wastewater was satisfactory.