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钯(Ⅱ)与二溴对甲基偶氮二溴羧显色反应的研究
Study on the Colour Reaction of Pd(Ⅱ)-3-(2,6- dibromo-4-methypheny-lazo)-6-(2,6-dibromo-4-Carboxyphenylazo)-4,5-dihydroxynaphthalene-2,7-disulfonic Acid
【摘要】 钯 (Ⅱ )与二溴对甲基偶氮二溴羧在硝酸介质中形成组成比为 1∶2的蓝紫色的配合物 ,其最大吸收波长位于 63 0nm处 ,表观摩尔吸光系数 ε63 0=4.46× 1 0 4L·mol-1 ·cm-1 ,钯的质量浓度在 0 .0 0~ 0 .80mg·L-1 范围内符合比尔定律 .该法简便、快速 ,常温下可在水相中直接测定微量钯 .应用于废钯催化剂回收液中钯含量的测定 ,结果满意
【Abstract】 In this paper,the conditions of colour reaction of Pd(Ⅱ)-3-(2,6- dibromo-4-methyphenylazo)-6-(2,6-dibromo-4-Carboxyphenylazo)-4,5-dihydroxynaphthalene-2,7-disulfonic acid and its application were studied.A new method for the determination of trace Pd(Ⅱ) is proposed.Beer’s law is obeyed for Pd(Ⅱ) in the range of 0.0~0.80mg·L-1,the molar absorptivity is 4.46×104L·mol-1·cm-1at 630nm.
- 【文献出处】 甘肃联合大学学报(自然科学版) ,Journal of Gansu Education College(Natural Science Edition) , 编辑部邮箱 ,2005年01期
- 【分类号】O657.3
- 【被引频次】6
- 【下载频次】51