摘要
在乙醇存在下,镍、钴、锌在pH 6.6六胺缓冲溶液中可与显色剂2-(6-甲基-2-苯并噻唑偶氮)-5-二乙氨基苯甲酸(MBTAEB)形成稳定的配合物,其表观摩尔吸光系数分别为:εN64i6 nm=1.49×105L.mol-1.cm-1;εC65o0 nm=1.32×105L.mol-1.cm-1;εZ63n0 nm=7.7×104L.mol-1.cm-1。但三种络合物的吸收光谱重叠相互干扰,应用多波长线性回归法,可在三离子共存下单独测定。方法简单、快速、灵敏度高,可不经分离同时测定三种离子的含量。
In the study of the color reactions of Ni（ H ）, Co（ H ） and Zn（ H ） with the color reagent 2-（6- methyl-2-benzothiazolylazo）-5-diethylaminobenzoic acid （abbreviated as MBTAEB） in hexamine buffer of pH 6. 6 and in the presence of ethanol separately, highly sensitive reactions were observed giving molar absorptivities of ε646^Ni =1.49 × 10^5L · mol^-1 · cm^-1, ε650^Co = 1. 32 × 10^5L · mol^-1 · cm^-1 and ε650^Zn = 7. 7 × 10^4L · mol^-1 · cm^-1, respectively. But the absorption spectra were seriously overlapped making the direct determinations impossible The problem of spectral-overlapping was solved by the application of AKC matrix analysis, a simple, rapid and selective method for the simultaneous determination of Nickel（ Ⅱ ） Cobalt（ Ⅱ ） and Zn（ Ⅱ ） ions in a same solution without the necessity of separation was made possible
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2006年第6期440-442,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
安徽省教育厅自然科学研究计划项目(2006KJ131B)
关键词
分光光度法
矩阵法
镍
钴
锌
Spectrophotometry
Matrix analysis
Nickel（ Ⅱ ）
Cobalt（ Ⅱ ）
Zin（ Ⅱ ）
