FIELD: check of vessels to take samples and determine presence of residues of contamination in vessels. SUBSTANCE: process sampling and detecting presence of volatile contaminating substances in vessel includes following steps: pumping of compressed air into vessel to drive out at least portion of its content, taking of sample with the help of exhaust pump from driven out content of vessel with application of suction and analysis of sample to determine presence or absence of residues of contamination in it. EFFECT: provision for detection of presence or absence of wide range of specific substances such as nitrogen-carrying compounds and hydrocarbons. 12 cl, 3 dwg, 1 tbl
