摘要
在pH 10.38的Britton-Robison缓冲介质中,硫酸镍与酸性铬兰K(ACBK)共存时,溶液变为紫色,在516 nm、548~554 nm附近各产生一个新的吸收峰,600 nm处出现明显的褪色现象。考察了体系最适宜的实验条件,发现:在516 nm、600 nm处ACBK-Ni^(2+)体系的ΔA与硫酸镍浓度均具有良好的线性关系,其中600 nm处的线性关系最好,r为0.9974,ΔA=0.1191-0.1297 c,用于环境水样中Ni^(2+)含量的测定,回收率为99.5%~106.4%,RSD为1.0%~1.2%,结果可靠,由此建立了一种测定环境中Ni^(2+)含量的光度法。
In pH 10.38 Britton-Robison buffer medium,the nickel sulfate and the acid chrome blue K coexisted with each other,the color of the solution became purple.The new absorption peaks were generated in the vicinity of 548~554 nm,516 nm and there was a significant fading at 600 nm.The optimum experimental conditions of the system were investigated.It was found thatΔA of ACBK-Ni^(2+)system had a good linear relationship with the concentration of the nickel sulfate at 516 nm and 600 nm.The best linear relationship was at 600 nm,the correlation coefficient r was 0.9974,the linear regression equation of one variable wasΔA=0.1191-0.1297 c.When the method was applied to determine nickel ion in the environment water samples,the recovery rate was 99.5%~106.4%,RSD was 1.0%~1.2%.The results were satisfactory.A new method for the determination of nickel ion in the environment was established.
作者
杨卓
朱薛轲
杨红兵
YANG Zhuo;ZHU Xue-ke;YANG Hong-bing(College of Chemistry and Chemical Engineering,Luoyang normal university,Henan Luoyang 471934,China)
出处
《广州化工》
CAS
2023年第15期67-69,共3页
GuangZhou Chemical Industry
基金
2021年校级一流本科课程项目(项目编号:PX-1121406)。
关键词
硫酸镍
光度法
酸性铬兰K
nickel sulfate
spectrophotometry
acid chrome blue K
