摘要
研究了新试剂2-(2-喹啉偶氮)-4,5-二甲基苯酚(QADMP)与钴(Ⅱ)的显色反应,在pH=3.6的HAc-NaAc缓冲介质中,十二烷基磺酸钠(SDS)存在下,QADMP与钴(Ⅱ)生成2∶1稳定的配合物,该配合物λmax=575nm,摩尔吸光系数ε为2.31×104L·mol-1·cm-1.钴含量在0～20μg/25mL内符合比尔定律,该方法方法用于水样中微量钴的测定,结果满意.
The color reaction of cobalt(II) with 2-(2-Quinolinlazo)-4,5-Dimethylhydroxybenzen was studied. In the presence of pH = 3.6 HAc-NaAc buffer solution and SDSmedium, QADMP reacts with cobalt (Ⅱ) to form a stable 2∶1 complex. In the measured solution, the molar absorption is1. 2.31×10~4 L·mol^(-1)·cm^(-1). at λ_(max)=575nm. Beer's law was obeyed in range of 0～20.0μg/25mL. This method can be applied to the determination of cobalt in water with satisfactory results.
出处
《云南民族大学学报（自然科学版）》
CAS
2005年第2期125-127,共3页
Journal of Yunnan Minzu University:Natural Sciences Edition
基金
国家烟草专卖局科学研究基金资助项目(2003B-202).
