摘要
报道了新显色剂喹啉基重氮氨基偶氮苯与镉的显色反应及光度测定微量镉的新方法．在ＯＰ存在下的硼砂－氢氧化钠缓冲介质中，该试剂与镉反应生成２：１的橙红色络合物，最大吸收波长位于５２４ｎｍ，表观摩尔吸光系数ε＝１．８５×１０５，镉量在０～１０μｇ／２５ｍＬ范围内遵守比尔定律。显色反应具有良好的选择性，直接应用于工业废水中微量镉的测定，结果满意。
A highly sensitive spectrophotometric method for cadmium with a new chromogenic reagent quinolyldiazoaminoazobenzene (QDAB) has been developed. In the presence of the nonionic surfactant OP and borax buffer so lution, cadmium with QDAB forms an orange-red complex which has an absorption maximum at 524nm. The apparent molar absorptivity is 1.85×10~5L· mol-1·cm-1. Beer's law is obeyed over the concentration range of 0-10μg Cd(Ⅱ)/25mL. Theproposed method has been applied to the determination of microamount of cadrnium in the industrial waste water withsatisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
1999年第3期21-23,共3页
Metallurgical Analysis
