A method for the determination of trace organic amines in atmospheric particles

Abstract

The invention discloses a method for determination of trace organic amine in atmospheric particulate matters, wherein the method comprises the steps: S1, preparation of a standard solution and a derivatization reagent; S2, sample pretreatment; S3, detection wavelength selection; S4, on-machine detection and on-line derivatization; and S5, qualitative and quantitative analysis. Under conditions without tedious offline derivatization at present, the method sensitively and accurately determines seven organic amines of ethanol amine, methylamine, ethylamine, propylamine, butylamine, pentylamine and hexylamine in the atmospheric particulate matters.

Description

technical field [0001] The invention belongs to the field of chemical analysis, in particular to a method for determining trace organic amines in atmospheric particles. Background technique [0002] Organic amines, which can be regarded as derivatives of ammonia, are typical organic nitrogen-containing compounds in the atmosphere. As typical organic nitrogen-containing compounds, organic amines make important contributions to human health and the formation of atmospheric aerosols. First of all, common low-molecular-weight organic amines such as methylamines and ethylamines not only have an unpleasant stench and fishy smell, but also are highly volatile, and can enter the human body through the skin, respiratory tract, etc., affecting human health; in addition In addition, low-molecular-weight organic amines are also precursors of nitrosamines and nitrosamines with teratogenic and carcinogenic effects. Secondly, as water-soluble compounds, organic amines can promote the hyg...

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Problems solved by technology

Among them, the sensitivity of gas chromatography and ion chromatography is low, and it is difficult to completely separate the organic amines with low molecular weight and relatively similar structure; although liquid phase mass spectrometry has high sensitivity, it is expensive, easy to residue and difficult for operation. Higher requirements for personnel; liquid chromatography and gas phase mass spectrometry are currently the more commonly used methods for the determination of atmospheric organic amines, but both require derivatization to reduce the polarity of the target compound and improve the selectivity and sensitivity of the target compound. Methods are often cumbersome to operate, take a long time to derive, and have poor reproducibility

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