TY JOUR TI AN INTEGRATED APPROACH TO THE RESEARCH OF FIRE EXTINGUISHING POWDER AGENTS DURING FIRES EXAMINATION KW fire extinguishing powder agents KW fire extinguishing compositions KW elemental analysis KW morphological analysis KW infrared spectroscopy KW X-ray fluorescence analysis KW X-ray phase analysis KW scanning electron microscopy KW infrared spectroscopy KW fire-technical examination JO MONITORING AND EXPERTISE IN SAFETY SYSTEM AU Princeva, M.Y. AU Pariyskaya, A.Y. AU Mokryak, A.V. PY 2024 IS 2024 PB Saint-Petersburg University of State Fire Service of Emercom of Russia