Method and device for simultaneously acquiring gas and granular ammonia and organic amino

Abstract

The invention discloses a method and a device for simultaneously acquiring gas and granular ammonia and organic amino. The method comprises the following steps: I, performing air sampling, namely allowing ambient air to pass through a sampling inlet at a velocity of 100L / minute; II, collecting granular ammonia and organic amino, namely passing the sampled air through a quartz filtering membrane baked at high temperature so as to collect granular ammonia and organic amino; III, collecting gas ammonia and organic amino, namely further allowing the sampled air passing through the quartz filtering membrane to pass through a pickling filtering membrane, so that the gas-state ammonia and organic amino are absorbed by the pickling filtering membrane. The invention provides a method for sampling important inorganic and organic alkali nitrogen-containing compounds in the atmosphere simultaneously and has the characteristics of being simple and convenient to operate and low in cost, and a technical support for acquiring concentration of the alkali nitrogen-containing compound and studying gas-solid conversion process is provided.

Description

technical field [0001] The invention belongs to the technical field of collecting gaseous and granular basic nitrogen-containing compounds, and in particular relates to a method and a device for simultaneously collecting gaseous and granular ammonia and organic amines. Background technique [0002] Nitrogen is an essential nutrient element for organisms around the world, and nitrogen in the atmosphere makes an important contribution to global biogeochemical cycles. Although nitrogen is the main component of nitrogen in the atmosphere, inert nitrogen can only be used by a small number of organisms that can fix nitrogen, and it can be absorbed and utilized by organisms and has an important impact on atmospheric chemistry and human health. nitrogen. Ammonia and organic amines, as important inorganic and organic nitrogen-containing compounds in the atmosphere, not only widely exist in the atmospheric gas phase, but also exist in the atmosphere in the form of particles through n...

AI Technical Summary

Problems solved by technology

The above two methods are only aimed at the collection of gaseous ammonia or gaseous trimethylamine, and because the sampling flow concentration is low, the detection limit of the method is relatively limited, although it is suitable for the sampling of higher concentration trimethylamine such as high concentration odor pollution sources, but It is likely that it cannot meet the determination requirements of trimethylamine or other organic amines in ambient air

Szulejko and Kim (2014, Trendsin Analytical Chemistry) summarized the methods for collecting atmospheric gaseous organic amines, including dissolution devices, adsorption methods, and solid-phase microextraction methods, which are relatively expensive

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