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在现代分析领域中,高浓度基体中痕量组分的测定始终是一个棘手的问题．应用离子色谱测定高浓度基体中的痕量离子,由于受到分离柱交换容量的限制,样品不能直接大量进样分析．一般需要先进行样品前处理或通过柱切换技术,除去大量的干扰离子和浓缩痕量被测离子,然后再对样品进行分离测定．以上方法不仅操作复杂费时,而且影响结果准确度的因素较多．
In the field of modern analysis, the determination of trace components in high-concentration matrices has always been a thorny issue. Application of ion chromatography determination of trace concentrations of ions in the matrix, due to the separation column exchange capacity constraints, the sample can not be a large number of direct injection analysis. Generally need to sample pretreatment or column switching technology to remove a large number of interfering ions and the concentration of trace ions to be measured, and then the sample was measured separately. The above method is not only complicated and time-consuming operation, but also affect the accuracy of the results of more factors.