Xu Q, Zhang S, Zhang W, Jin L, Tanaka K, Haraguchi H, Itoh A
Department of Chemistry, East China Normal University, Shanghai, PR China.
Fresenius J Anal Chem. 2000 Jun;367(3):241-5. doi: 10.1007/s002160000341.
An amperometric detector based on the chemical modification of Nafion and indium (III) hexacyanoferrate (II, III) thin film (Nafion/In-CN-Fe) onto a glassy carbon (GC) electrode, was first successfully used for the determination of electroinactive cations (Li+, Na+, K+, Rb+, Cs+, NH4+) in single column ion chromatography (IC). A set of well-defined peaks of electroinactive cations was obtained. The detection limits of the cations are 8.9 x 10(-6) mol/L for Li+, 2.3 x 10(-6) mol/L for Na+, 5.2 x 10(-6) mol/L for K+, 4.8 x 10(-6) mol/L for Rb+, 4.0 x 10(-6) mol/L for Cs+ and 5.3 x 10(-6) mol/L for NH4+ at a single-to-noise ratio of 3. The proposed method was quick, sensitive and simple. The cations in rainwater and mineral water were successfully analyzed by this method.
一种基于将Nafion和六氰合铁（II, III）酸铟（III）薄膜（Nafion/In-CN-Fe）化学修饰到玻碳（GC）电极上的安培检测器，首次成功用于单柱离子色谱（IC）中电活性阳离子（Li+、Na+、K+、Rb+、Cs+、NH4+）的测定。获得了一组明确定义的电活性阳离子峰。在信噪比为3时，Li+、Na+、K+、Rb+、Cs+和NH4+的阳离子检测限分别为8.9×10(-6) mol/L、2.3×10(-6) mol/L、5.2×10(-6) mol/L、4.8×10(-6) mol/L、4.0×10(-6) mol/L和5.3×10(-6) mol/L。所提出的方法快速、灵敏且简单。该方法成功分析了雨水和矿泉水中的阳离子。
