摘要
合成了显色剂7-(4-安替比林偶氮)-8-羟基喹啉(AP-8Q),通过红外和核磁共振进行了结构确证,并研究了该试剂与Ni(Ⅱ)的显色反应.实验结果表明:在pH为6.8的Na_(2)HPO_(4)-K_(2)HPO_(4)缓冲溶液中,Ni(Ⅱ)与AP-8Q形成了稳定的橙红色配合物,其最大吸收波长为488 nm,对比度Δλ为90 nm,Ni(Ⅱ)的质量浓度在0~1.0 mg/L时服从Beer定律,表观摩尔吸光系数为6.7×10^(5)L·mol^(-1)·cm^(-1),检出限为0.864μg/L,灵敏度很高.分别通过摩尔比法和等摩尔连续变化法测得Ni(Ⅱ)与显色剂的络合比为1∶4,并研究了七种常见的金属离子对显色反应的干扰,测定了它们的最大允许量.
A kind of chromogenic reagent,7-(4-antipyrinylazo)-8-hydroxyquinoline(AP-8Q)was synthesized,and its structure was confirmed by infrared and nuclear magnetic resonance.The color reaction of Ni(II)with AP-8Q was studied.The results showed that Ni(II)reacted with AP-8Q in the medium of Na_(2)HPO_(4)-K_(2)HPO_(4)buffer solution of pH 6.8 to form a stable orange red complex,which had its absorption maxima at 488 nm and aΔλof 90 nm.Beer′s law is obeyed in the range of 0~1.0 mg·L^(-1)of Ni(II)and the apparent molar absorption coefficient is 6.7×10^(5)L·mol^(-1)·cm^(-1).The method detection limit was 0.864μg/L with a high sensitivity.The ratio of chelates of Ni(II)with AP-8Q was 1∶4,which was determined by molar ratio method and molar ratio method respectively.The influence of seven common metallic ions was also examined and their maximum allowable contents had been determined.
作者
朱晓宇
梁雨苏
于秀兰
刘禹
ZHU Xiaoyu;LIANG Yusu;YU Xiulan;LIU Yu(Shenyang University of Chemical Technology,Shenyang 110142,China;North Huajin Chemical Industries Group Corporation,Panjin 124021,China)
出处
《沈阳化工大学学报》
2024年第5期385-389,共5页
Journal of Shenyang University of Chemical Technology
基金
国家自然科学基金项目(21502118)
辽宁省自然基金项目(2019-ZD-0071)。
