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首页> 外文期刊>Journal of separation science. >Ion chromatography with the indirect ultraviolet detection of alkali metal ions and ammonium using imidazolium ionic liquid as ultraviolet absorption reagent and eluent
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Ion chromatography with the indirect ultraviolet detection of alkali metal ions and ammonium using imidazolium ionic liquid as ultraviolet absorption reagent and eluent

机译：咪唑鎓离子液体作为紫外吸收剂和洗脱液的间接色谱法，间接检测碱金属离子和铵的离子色谱

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摘要

Indirect ultraviolet detection was conducted in ultraviolet-absorption-agent-added mobile phase to complete the detection of the absence of ultraviolet absorption functional group in analytes. Compared with precolumn derivatization or postcolumn derivatization, this method can be widely used, has the advantages of simple operation and good linear relationship. Chromatographic separation of Li+, Na+, K+, and NH4+ was performed on a carboxylic acid base cation exchange column using imidazolium ionic liquid/acid/organic solvent as the mobile phase, in which imidazolium ionic liquids acted as ultraviolet absorption reagent and eluting agent. The retention behaviors of four kinds of cations are discussed, and the mechanism of separation and detection are described. The main factors influencing the separation and detection were the background ultraviolet absorption reagent and the concentration of hydrogen ion in the ion chromatography-indirect ultraviolet detection. The successful separation and detection of Li+, Na+, K+, and NH4+ within 13 min was achieved using the selected chromatographic conditions, and the detection limits (S/N = 3) were 0.02, 0.11, 0.30, and 0.06 mg/L, respectively. A new separation and analysis method of alkali metal ions and ammonium by ion chromatography with indirect ultraviolet detection method was developed, and the application range of ionic liquid was expanded.
机译：在添加了紫外线吸收剂的流动相中进行间接紫外线检测，以完成对分析物中不存在紫外线吸收官能团的检测。与柱前衍生或柱后衍生相比，该方法可广泛使用，具有操作简单，线性关系好等优点。 Li +，Na +，K +和NH4 +的色谱分离是在羧酸基阳离子交换柱上使用咪唑离子液体/酸/有机溶剂作为流动相进行的，其中咪唑离子液体充当紫外线吸收剂和洗脱剂。讨论了四种阳离子的保留行为，并描述了分离和检测的机理。影响分离和检测的主要因素是背景紫外吸收剂和离子色谱-间接紫外检测中氢离子的浓度。使用选定的色谱条件在13分钟内成功分离和检测了Li +，Na +，K +和NH4 +，检测限（S / N = 3）分别为0.02、0.11、0.30和0.06 mg / L 。开发了一种间接紫外检测法离子色谱法分离和分析碱金属离子和铵的新方法，扩大了离子液体的应用范围。

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