Method for simultaneously testing inorganic anions and aniline compounds by two-dimensional system

The invention discloses a method for simultaneously separating and detecting inorganic anions and aniline compounds in wastewater by a novel high performance liquid chromatography-ion chromatography two-dimensional system, belonging to the technical field of testing the material content by the high performance liquid chromatography-ion chromatography two-dimensional system. The liquid chromatography-ion chromatography two-dimensional system consists of a liquid chromatographic pump, an automatic sampler, an organic capture column, a liquid chromatographic column, an ion chromatographic column, a six-way valve, an ultraviolet detector and a conductive detector. The system is characterized in that inorganic anions and aniline compounds in wastewater can be simultaneously separated and detected by sampling at a time. When the inorganic anions and aniline compounds pass through a porous graphite carbon short column, the aniline compounds are strongly retained in the porous graphite carbon short column while the inorganic anions quickly enter the ion chromatographic column to be analyzed and detected by using the conductive detector; meanwhile, the aniline compounds are transferred to the liquid chromatographic system through a switching valve and are quickly detected by using the ultraviolet detector.