摘要
研究了4-(6-甲氧基-8-喹啉偶氮)-邻苯二酚与Cd(Ⅱ)的显色反应及光度法测定痕量镉的新方法。在OP存在下,碳酸钠-碳酸氢钠缓冲介质中,该试剂与Cd(Ⅱ)生成稳定的带负电荷的1∶2的配合物。其最大吸收波长为565nm,表观摩尔吸光系数为4.68×104L/(mol.cm)。在0.1～1.0μg/mL范围内服从朗伯-比尔定律。显色反应具有良好的选择性,直接应用于环境水样中痕量镉的测定,结果满意。
A new method for the determination of trace cadmium by the spectrophotometric reaction of a reagent 4-（6-methoxyl-8-quinolineazo）-pyrocatechol （MQAPC） with Cd（Ⅱ） was developed. In the presence of the nonionic surfactant OP and in Bicarbonate/Carbonate buffer solution,Cd（Ⅱ） with MQAPC formed a stable,negatively charged,1：2 ratio complex. It has an absorption maximum at 565nm and its appearent molar absorptivity is 4.68×104L/（mol·cm）. Beer＇s law is obeyed over the concentration range of 0.1~1.0μg/mL Cd（Ⅱ）. The proposed method was applied to the determination of trace cadmium in environmental water with satisfactory results obtained.
出处
《淮海工学院学报（自然科学版）》
CAS
2010年第2期49-51,共3页
Journal of Huaihai Institute of Technology:Natural Sciences Edition
基金
淮海工学院校内科研项目(KX02017)
