Rapid determination of bromide in seawater samples by capillary ion chromatography using monolithic silica columns modified with cetyltrimethylammonium ion.
Rapid determination of bromide in seawater samples by capillary ion chromatography using monolithic silica columns modified with cetyltrimethylammonium ion.
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DOI：
10.1016/j.talanta.2005.12.064
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发表时间：
2006-08
期刊：
影响因子：
6.1
通讯作者：
Atsushi Suzuki;L. Lim;Toshiya Hiroi;T. Takeuchi
中科院分区：
文献类型：
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作者：
Atsushi Suzuki;L. Lim;Toshiya Hiroi;T. Takeuchi
研究了季铵离子动态修饰硅胶毛细管整体柱测定海水中痕量溴离子的方法。将季铵离子如十六烷基三甲基铵离子动态地引入到整体式二氧化硅表面上。改性剂的第一层通过静电相互作用引入，而第二层通过疏水相互作用引入。后一层作为阴离子交换位点。改性硅胶毛细管整体柱可用于无机阴离子的快速分离。在几分钟内实现了五种阴离子的真实混合物的分离。在洗脱液中加入少量改性剂，可提高保留时间的重现性。海水样品可直接进样到制备好的毛细管柱上，溴离子的测定值为63 mg/L。
Monolithic silica capillary columns dynamically modified with quaternary ammonium ions were evaluated for the determination of bromide in seawater samples. A quaternary ammonium ion such as cetyltrimethylammonium ion was dynamically introduced onto monolithic silica surfaces. The first layer of the modifier was introduced by electrostatic interaction, whereas the second layer was introduced by hydrophobic interaction. The latter layer worked as the anion-exchange sites. The modified monolithic silica capillary columns could be used for rapid separation of inorganic anions. Separation of authentic mixture of five anions was achieved within a few minutes. The addition of small amount of the modifier in the eluent improved the repeatability of the retention time. Seawater samples could be directly injected onto the prepared capillary columns, and bromide could be determined to be 63mg/L.