Účinnost respiračních ochranných prostředků proti mikronovým a submikronovým pevným částicím v pracovním prostředí

Abstract

This diploma thesis deals with the issue of respiratory protective equipment effectiveness against solid particles at work. Saliva samples were obtained from volunteers on two days. On the first day, the respondents worked without a respirator and on the second day, they worked with a respirator. The obtained saliva samples were analyzed using a scanning electron microscope (spot analysis and automatic area analysis) and a vibrating magnetometer. Metal-based particles, specifically particles of iron, nickel, copper, titanium, aluminium, silver and manganese, were detected by spot analysis. Particles based on iron, titanium and cerium were detected by automatic area analysis. Ferromagnetic and diamagnetic properties of iron-containing samples were subsequently determined. Many detected elements have already been shown to have a negative effect on living organisms. The information found indicates that respiratory protective equipment at work cannot be described as entirely efficient; nevertheless, it prevents the penetration of large particles into the human respiratory tract.