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

Abstract

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.

Description

technical field [0001] The invention relates to an analysis method for simultaneously separating and detecting the contents of inorganic anions and aniline compounds in waste water, and belongs to the technical field of high-performance liquid chromatography-ion chromatography two-dimensional system for determining substance contents. Background technique [0002] Aniline compounds are common industrial pollutants, which are widely used in pharmaceutical, dye and resin industries. They are carcinogenic, toxic and difficult to degrade, and are harmful to human health and crop cultivation. Therefore, they are widely used in industrial Wastewater has strict discharge requirements; industrial wastewater also has detection requirements for inorganic anions, such as fluoride, phosphate, sulfate, and nitrite. [0003] At present, there are many methods available for the independent detection of these two types of substances, such as liquid chromatography (HPLC), ion chromatography ...

AI Technical Summary

Problems solved by technology

Conventional C18 columns cannot withstand mobile phases with a pH>8, and ion chromatography columns cannot withstand high proportions of organic phases. Therefore, the key to building an HPLC-IC two-dimensional system is to find a device that is compatible with the mobile phases of the two systems or Column

Due to the difficulty of building the HPLC-IC two-dimensional system, only a few people have successfully applied it to actual detection

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