摘要
建立了镉-碘化钾-罗丹明B高灵敏显色体系，在聚乙烯醇存在下，0．12mol·L^-1硫酸时，Cd^2＋和I^-及罗丹明B形成三元显色络合物，稳定时间可达1h。镉离子的质量浓度在0～3μg／25mL时服从比耳定律，ε605=6．84×10^5L·mol^-1·cm矗。。用于测定湖水中镉的含量，测量结果的相对标准偏差值均小于0．6％，加标回收率在98．2％-100．1％之间。
In a sulfuric acid solution of 0. 12 mol . L^-1 and in the presence of PVA, a ternary complex was formed among Cd（Ⅱ ）, KI and rhodamine B, which was stable for at least 1 k Beer＇s law was held in the range of 0--3 μg/25 ML of Cd（ Ⅱ）, giving the molar absorptivity （ε） 6.84× 10^5L .mol^-1. cm^-1 at its absorption maxima of 605nm. It its application to the determination of cadmium in lake water. RSD＇s of the analytical results were less than 0. 6%, and recoveries found were in the range of 98.2%--100. 1%
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2006年第9期719-720,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
光度法
镉(Ⅱ)
碘化钾
罗丹明B
湖水
Photometry
Cadmium（ Ⅱ）
Potassium iodide
Rhodamine B
Lake water
