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报道了2-羟基-5-磺酸苯基重氮氨基偶氮苯(HSDAA)的合成方法。该试剂与镉在氨性介质中形成3:1的红色配合物,于520nm波长处有最大吸收,摩尔吸光系数为1.88×10~5。镐量在0～10μg/25ml范围内符合比耳定律。在氨水-磺基水杨酸体系中,多种离子不影响测定,可不经分离直接测定锌合金中微量镉。
The synthesis of 2-hydroxy-5-sulfonic acid phenyl diazoaminoazobenzene (HSDAA) has been reported. The reagent forms a 3: 1 red complex with cadmium in ammoniacal medium and has a maximum absorption at 520 nm with a molar extinction coefficient of 1.88 × 10 -5. Beer pick volume in the range of 0 ~ 10μg / 25ml Beer’s law. In ammonia - sulfosalicylic acid system, a variety of ions do not affect the determination of zinc can be directly determined without separation of trace amounts of cadmium.