NGHIÊN CỨU CHẾ TẠO ỐNG PHÁT HIỆN KHÍ NH3 PHỤC VỤ QUAN TRẮC, GIÁM SÁT MÔI TRƯỜNG LAO ĐỘNG

Tóm tắt

Toxic gas indicator tubes have been studied and applied as an instrument to monitor and assess air
quality in many countries (USA, Japan, Germany, China). In Vietnam, a number of national standards
have been issued on the use of toxic gas indicator tubes for the purpose of assessing the quality of natural
gas. However, at present, the manufacturing of these indicator tubes is very limited. This paper presents
the research results and the fabrication of NH3 gas detection tubes based on the ammonium gas indicator
reaction by a pH indicator on a quartz sand substrate. This paper also presents the experimental results of
determining single manufacturing component and the factors that affect the ability to measure NH3
concentration in the field. With the laboratory production conditions, the proposed indicator tubes is
capable of quickly detecting toxic gas in the field with an error of about 1 ÷ 9,5%.