Abstract
The state-of-the-art of the problem of the migration of ammonia from building materials into the air of residential premises is discussed in the article. The international nature of the problem of ammonia pollution of indoor air in residential and office buildings was shown in the literature review. A method for the photometric determination of the content of nitrogen-containing compounds in the form of ammonium nitrogen with Nessler's reagent in concrete was propesd by the authors. This technique allows to control the ammonia content at a safe level. Also the method of potentiometric determination of the content of nitrogen-containing compounds for the analysis of additives for concrete was implemented by the authors. This analysis method allows prevent the use of additives that can potentially serve as a source of ammonia emissions during the exploitation of building materials.
Highlights
Since 2007 more than half of the world's population has residence in cities according to the information of The United Nations Department of Economic and Social Affairs
Closed rooms of residential and administrative buildings have a peculiar microclimate. They are a reservoir of atmospheric air which contains in addition to the basic components a wide nomenclature of various chemical compounds often having a toxic effect on the human body
Pollutants can get into the air of rooms both from the outside with the influx of atmospheric air and from the inside - from the building materials of edifices, furniture and other objects inside the premises
Summary
The intensive use of concrete additives in the construction industry of our country can serve as a potential source of indoor air pollution This can lead to significant economic losses since there are currently no effective and efficient methods for the rehabilitation of rooms with an existing ammonia emission problem. According to the developed technique the ionomer is first calibrated by the calibration curve method in accordance with [15], and the concentration of ammonium ions in the analyzed samples is determined, and the temperature of the analyzed samples and calibration solutions should not differ by more than 3°C. The choice of the potentiometric method as the basis for determining the concentration of ammonium ions in concrete additives is justified by the following factors:. –unlike spectrophotometric analysis for potentiometric determination, the intrinsic color of the concrete additive is not significant
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