当需要确定硫化合物的物种时，可以任选地对硫杂质进行浓缩，然后直接输送到分离柱和检测器中，而从氧化装置旁路。
When speciation of sulfur compounds is required the sulfur impurities may be optionally concentrated and sent directly to a separation column and the detector bypassing the oxidation unit.
本文采用双柱在线离子交换预浓缩FIA-ICP系统，建立了水及土壤浸出液中痕量钼的测定方法。
Trace amounts of molybdenum in water and soil extract samples were determined using a dual column on-line ion-exchange preconcentration FIA-ICP system.
评叙了样品堆积，一种毛细管电泳提高检测灵敏度的柱上浓缩技术。
Sample stacking, an on-column preconcentration technique for capillary electrophoresis was reviewed with 51 references.
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