美国道化学公司发展了一种两柱式离子色谱仪,商业名称“Dionex”。色谱仪有两根柱,一根是分离柱,一根是抑制柱。分离柱在色谱仪中是将不纯物,或与分析无关的物质分离掉,以便进行下一步分析。常用的高性能液体色谱仪中在柱中一般是使用硅石为柱的填料,而“Dionex”色谱仪是用离子交换聚合物,作为柱的填料。这可以根据试样中离子经过填料的速度不同,而达到分离的目的。离子交换树脂被人们熟悉已有十多年了。它的缺点是在某些情况下,机械性能 U.S. Dow Chemical developed a two-column ion chromatograph under the trade name “Dionex.” The chromatograph has two columns, one for the separation column and one for the suppression column. Separation column in the chromatographic instrument is not pure, or non-analytical substances separated away for further analysis. Commonly used high-performance liquid chromatography in the column is generally used silica column packing, and “Dionex” chromatography is the use of ion exchange polymers, as column packing. This can be based on the sample ions in different speeds through the filler, and to achieve the purpose of separation. Ion exchange resins have been familiar for more than a decade. Its disadvantage is that in some cases, the mechanical properties